Anticoncepción (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Anticoncepción" in Spanish language version.

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acog.org

ACOG (9 de septiembre de 2014). «ACOG Statement on OTC Access to Contraception». Archivado desde el original el 10 de septiembre de 2014. Consultado el 11 de septiembre de 2014.

ajpmonline.org

Chin, H. B.; Sipe, T. A.; Elder, R.; Mercer, S. L.; Chattopadhyay, S. K.; Jacob, V.; Wethington, H. R.; Kirby, D. et al. (2012). «The Effectiveness of Group-Based Comprehensive Risk-Reduction and Abstinence Education Interventions to Prevent or Reduce the Risk of Adolescent Pregnancy, Human Immunodeficiency Virus, and Sexually Transmitted Infections». American Journal of Preventive Medicine 42 (3): 272-294. PMID 22341164. doi:10.1016/j.amepre.2011.11.006.

archive.org

Blenning, CE; Paladine, H (Dec 15, 2005). «An approach to the postpartum office visit.». American family physician 72 (12): 2491-6. PMID 16370405.
Cunningham, F. Gary; Stuart, Gretchen S. (12 de abril de 2012). «Contraception and sterilization». En Hoffman, Barbara; Schorge, John O.; Schaffer, Joseph I.; Halvorson, Lisa M.; Bradshaw, Karen D.; Cunningham, F. Gary, eds. Williams gynecology (2nd edición). New York: McGraw-Hill Medical. pp. 132–169. ISBN 978-0-07-171672-7.
Barbara L. Hoffman (2011). «5 Second-Tier Contraceptive Methods—Very Effective». Williams gynecology (2nd edición). New York: McGraw-Hill Medical. ISBN 0071716726.
Havrilesky, LJ; Moorman, PG; Lowery, WJ; Gierisch, JM; Coeytaux, RR; Urrutia, RP; Dinan, M; McBroom, AJ; Hasselblad, V; Sanders, GD; Myers, ER (julio de 2013). «Oral Contraceptive Pills as Primary Prevention for Ovarian Cancer: A Systematic Review and Meta-analysis». Obstetrics and gynecology 122 (1): 139-147. PMID 23743450. doi:10.1097/AOG.0b013e318291c235.
Kuyoh, MA; Toroitich-Ruto, C; Grimes, DA; Schulz, KF; Gallo, MF (enero de 2003). «Sponge versus diaphragm for contraception: a Cochrane review.». Contraception 67 (1): 15-8. PMID 12521652. doi:10.1016/s0010-7824(02)00434-1.
Committee on Adolescent Health Care Long-Acting Reversible Contraception Working Group, The American College of Obstetricians and, Gynecologists (octubre de 2012). «Committee opinion no. 539: adolescents and long-acting reversible contraception: implants and intrauterine devices.». Obstetrics and gynecology 120 (4): 983-8. PMID 22996129. doi:10.1097/AOG.0b013e3182723b7d.
Adams CE, Wald M (agosto de 2009). «Risks and complications of vasectomy». Urol. Clin. North Am. 36 (3): 331-6. PMID 19643235. doi:10.1016/j.ucl.2009.05.009.
Nagler, HM; Jung, H (agosto de 2009). «Factors predicting successful microsurgical vasectomy reversal.». The Urologic clinics of North America 36 (3): 383-90. PMID 19643240. doi:10.1016/j.ucl.2009.05.010.
Fortenberry, J. Dennis (2005). «The limits of abstinence-only in preventing sexually transmitted infections». Journal of Adolescent Health 36 (4): 269-70. PMID 15780781. doi:10.1016/j.jadohealth.2005.02.001. , which cites:
Brückner, Hannah; Bearman, Peter (2005). «After the promise: The STD consequences of adolescent virginity pledges». Journal of Adolescent Health 36 (4): 271-8. PMID 15780782. doi:10.1016/j.jadohealth.2005.01.005.
Duffy, K; Lynch, DA; Santelli, J (diciembre de 2008). «Government support for abstinence-only-until-marriage education.». Clinical pharmacology and therapeutics 84 (6): 746-8. PMID 18923389. doi:10.1038/clpt.2008.188.
Kowal D (2007). «Abstinence and the Range of Sexual Expression». En Hatcher, Robert A., ed. Contraceptive Technology (19th rev. edición). New York: Ardent Media. pp. 81–86. ISBN 0-9664902-0-7.
Leung, Vivian W. Y.; Levine, Marc; Soon, Judith A. (febrero de 2010). «Mechanisms of Action of Hormonal Emergency Contraceptives». Pharmacotherapy 30 (2): 158-168. doi:10.1592/phco.30.2.158. «The evidence strongly supports disruption of ovulation as a mechanism of action. The data suggest that emergency contraceptives are unlikely to act by interfering with implantation».
Hall, Ruth (1977). Passionate Crusader. Harcourt, Brace, Jovanovich. p. 186.
Hall, Lesley (2011). The life and times of Stella Browne : feminist and free spirit. London: I. B. Tauris. p. 173. ISBN 9781848855830.
Alesha Doan (2007). Opposition and Intimidation: The Abortion Wars and Strategies of Political Harassment. University of Michigan Press. p. 53-54. ISBN 9780472069750.
Alesha Doan (2007). Opposition and Intimidation: The Abortion Wars and Strategies of Political Harassment. University of Michigan Press. p. 62-63. ISBN 9780472069750.
Feldman, David M. (1998). Birth Control in Jewish Law. Lanham, MD: Jason Aronson. ISBN 0-7657-6058-4.

arhp.org

«Update on Emergency Contraception». Association of Reproductive Health Professionals. marzo de 2011. Archivado desde el original el 11 de mayo de 2013. Consultado el 20 de mayo de 2013.

bbc.co.uk

news.bbc.co.uk

«Goat 'condoms' save Kenyan herds». BBC News. 6 de octubre de 2008. Consultado el 6 de octubre de 2008.

books.google.com

Ammer, Christine (2009). «oral contraceptive». The encyclopedia of women's health (6th edición). New York: Facts On File. pp. 312-315. ISBN 978-0-8160-7407-5.
Gupta, Ramesh C. (25 de febrero de 2011). Reproductive and Developmental Toxicology. Academic Press. p. 105. ISBN 978-0-12-382032-7.
Lipsey, Richard G.; Carlaw, Kenneth; Bekar, Clifford (2005). «Historical Record on the Control of Family Size». Economic Transformations: General Purpose Technologies and Long-Term Economic Growth. Oxford University Press. pp. 335-40. ISBN 978-0-19-928564-8.
Simms, Madeleine (27 de enero de 1977). «Review: A History of the Malthusian League 1877-1927». New Scientist.
Wilkinson Meyer, Jimmy Elaine (2004). Any friend of the movement: networking for birth control, 1920–1940. Ohio State University Press. p. 184. ISBN 978-0-8142-0954-7.
Fritz, Marc A.; Speroff, Leon (2011). «Intrauterine contraception». Clinical gynecologic endocrinology and infertility (8th edición). Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. pp. 1095-1098. ISBN 978-0-7817-7968-5.
Bob Digby (2001). Bob Digby, ed. Heinemann 16-19 Geography: Global Challenges Student Book 2nd Edition. Heinemann. p. 158. ISBN 978-0-435-35249-3.

cdc.gov

Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC) (21 de junio de 2013). «U.S. Selected practice recommendations for contraceptive use, 2013: adapted from the World Health Organization Selected practice recommendations for contraceptive use, 2nd edition». MMWR Recommendations and Reports 62 (5): 1-60. PMID 23784109.

cia.gov

Country Comparison: Maternal Mortality Rate Archivado el 8 de noviembre de 2012 en Wayback Machine. in The CIA World Factbook
«Contraceptive prevalence rate».

doi.org

dx.doi.org

Chin, H. B.; Sipe, T. A.; Elder, R.; Mercer, S. L.; Chattopadhyay, S. K.; Jacob, V.; Wethington, H. R.; Kirby, D. et al. (2012). «The Effectiveness of Group-Based Comprehensive Risk-Reduction and Abstinence Education Interventions to Prevent or Reduce the Risk of Adolescent Pregnancy, Human Immunodeficiency Virus, and Sexually Transmitted Infections». American Journal of Preventive Medicine 42 (3): 272-294. PMID 22341164. doi:10.1016/j.amepre.2011.11.006.
Gizzo, S; Fanelli, T; Di Gangi, S; Saccardi, C; Patrelli, TS; Zambon, A; Omar, A; D'Antona, D et al. (octubre de 2012). «Nowadays which emergency contraception? Comparison between past and present: latest news in terms of clinical efficacy, side effects and contraindications.». Gynecological Endocrinology 28 (10): 758-63. PMID 22390259. doi:10.3109/09513590.2012.662546.
DiCenso A, Guyatt G, Willan A, Griffith L (junio de 2002). «Interventions to reduce unintended pregnancies among adolescents: systematic review of randomised controlled trials». BMJ 324 (7351): 1426. PMC 115855. PMID 12065267. doi:10.1136/bmj.324.7351.1426.
Duffy, K.; Lynch, D. A.; Santinelli, J. (2008). «Government Support for Abstinence-Only-Until-Marriage Education». Clinical Pharmacology & Therapeutics 84 (6): 746-748. PMID 18923389. doi:10.1038/clpt.2008.188.
Carr, B.; Gates, M. F.; Mitchell, A.; Shah, R. (2012). «Giving women the power to plan their families». The Lancet 380 (9837): 80-82. PMID 22784540. doi:10.1016/S0140-6736(12)60905-2.
Cleland, J; Conde-Agudelo, A; Peterson, H; Ross, J; Tsui, A (14 de julio de 2012). «Contraception and health.». Lancet 380 (9837): 149-56. PMID 22784533. doi:10.1016/S0140-6736(12)60609-6.
Ahmed, S.; Li, Q.; Liu, L.; Tsui, A. O. (2012). «Maternal deaths averted by contraceptive use: An analysis of 172 countries». The Lancet 380 (9837): 111-125. PMID 22784531. doi:10.1016/S0140-6736(12)60478-4.
Canning, D.; Schultz, T. P. (2012). «The economic consequences of reproductive health and family planning». The Lancet 380 (9837): 165-171. PMID 22784535. doi:10.1016/S0140-6736(12)60827-7.
Van Braeckel, D.; Temmerman, M.; Roelens, K.; Degomme, O. (2012). «Slowing population growth for wellbeing and development». The Lancet 380 (9837): 84-85. PMID 22784542. doi:10.1016/S0140-6736(12)60902-7.
Trussell, James (mayo de 2011). «Contraceptive failure in the United States». Contraception 83 (5): 397-404. PMC 3638209. PMID 21477680. doi:10.1016/j.contraception.2011.01.021.
Trussell, James (1 de noviembre de 2011). «Contraceptive efficacy». En Hatcher, Robert A.; Trussell, James; Nelson, Anita L.; Cates, Willard Jr.; Kowal, Deborah; Policar, Michael S. (eds.), eds. Contraceptive technology (20th revised edición). New York: Ardent Media. pp. 779-863. ISBN 978-1-59708-004-0. ISSN 0091-9721. OCLC 781956734.
Van der Wijden, C; Kleijnen, J; Van den Berk, T (2003). «Lactational amenorrhea for family planning». Cochrane Database of Systematic Reviews (4): CD001329. PMID 14583931. doi:10.1002/14651858.CD001329.
«Contraception for Adolescents». Pediatrics. 29 de septiembre de 2014. doi:10.1542/peds.2014-2299.
Mansour, D; Gemzell-Danielsson, K; Inki, P; Jensen, JT (noviembre de 2011). «Fertility after discontinuation of contraception: a comprehensive review of the literature». Contraception 84 (5): 465-77. PMID 22018120. doi:10.1016/j.contraception.2011.04.002.
Tepper, NK; Curtis, KM; Steenland, MW; Marchbanks, PA (mayo de 2013). «Physical examination prior to initiating hormonal contraception: a systematic review.». Contraception 87 (5): 650-4. PMID 23121820. doi:10.1016/j.contraception.2012.08.010.
Brito, MB; Nobre, F; Vieira, CS (abril de 2011). «Hormonal contraception and cardiovascular system». Arquivos brasileiros de cardiologia 96 (4): e81-9. PMID 21359483. doi:10.1590/S0066-782X2011005000022.
Stegeman, BH; de Bastos, M; Rosendaal, FR; van Hylckama Vlieg, A; Helmerhorst, FM; Stijnen, T; Dekkers, OM (12 de septiembre de 2013). «Different combined oral contraceptives and the risk of venous thrombosis: systematic review and network meta-analysis». BMJ (Clinical research ed.) 347: f5298. PMC 3771677. PMID 24030561. doi:10.1136/bmj.f5298.
Burrows, LJ; Basha, M; Goldstein, AT (septiembre de 2012). «The effects of hormonal contraceptives on female sexuality: a review.». The journal of sexual medicine 9 (9): 2213-23. PMID 22788250. doi:10.1111/j.1743-6109.2012.02848.x.
Shulman, LP (octubre de 2011). «The state of hormonal contraception today: benefits and risks of hormonal contraceptives: combined estrogen and progestin contraceptives.». American journal of obstetrics and gynecology 205 (4 Suppl): S9-13. PMID 21961825. doi:10.1016/j.ajog.2011.06.057.
Havrilesky, LJ; Moorman, PG; Lowery, WJ; Gierisch, JM; Coeytaux, RR; Urrutia, RP; Dinan, M; McBroom, AJ; Hasselblad, V; Sanders, GD; Myers, ER (julio de 2013). «Oral Contraceptive Pills as Primary Prevention for Ovarian Cancer: A Systematic Review and Meta-analysis». Obstetrics and gynecology 122 (1): 139-147. PMID 23743450. doi:10.1097/AOG.0b013e318291c235.
Mantha, S.; Karp, R.; Raghavan, V.; Terrin, N.; Bauer, K. A.; Zwicker, J. I. (7 de agosto de 2012). «Assessing the risk of venous thromboembolic events in women taking progestin-only contraception: a meta-analysis». BMJ 345 (aug07 2): e4944-e4944. PMC 3413580. PMID 22872710. doi:10.1136/bmj.e4944.
Burke, AE (octubre de 2011). «The state of hormonal contraception today: benefits and risks of hormonal contraceptives: progestin-only contraceptives.». American journal of obstetrics and gynecology 205 (4 Suppl): S14-7. PMID 21961819. doi:10.1016/j.ajog.2011.04.033.
Rott, H (agosto de 2012). «Thrombotic risks of oral contraceptives.». Current Opinion in Obstetrics and Gynecology 24 (4): 235-40. PMID 22729096. doi:10.1097/GCO.0b013e328355871d.
«Condom Use by Adolescents». PEDIATRICS 132 (5): 973-981. 28 de octubre de 2013. doi:10.1542/peds.2013-2821.
Kuyoh, MA; Toroitich-Ruto, C; Grimes, DA; Schulz, KF; Gallo, MF (enero de 2003). «Sponge versus diaphragm for contraception: a Cochrane review.». Contraception 67 (1): 15-8. PMID 12521652. doi:10.1016/s0010-7824(02)00434-1.
Winner, B; Peipert, JF; Zhao, Q; Buckel, C; Madden, T; Allsworth, JE; Secura, GM. (2012). «Effectiveness of Long-Acting Reversible Contraception». New England Journal of Medicine 366 (21): 1998-2007. PMID 22621627. doi:10.1056/NEJMoa1110855.
Committee on Adolescent Health Care Long-Acting Reversible Contraception Working Group, The American College of Obstetricians and, Gynecologists (octubre de 2012). «Committee opinion no. 539: adolescents and long-acting reversible contraception: implants and intrauterine devices.». Obstetrics and gynecology 120 (4): 983-8. PMID 22996129. doi:10.1097/AOG.0b013e3182723b7d.
Black, K; Lotke, P; Buhling, KJ; Zite, NB; Intrauterine contraception for Nulliparous women: Translating Research into Action (INTRA), group (octubre de 2012). A review of barriers and myths preventing the more widespread use of intrauterine contraception in nulliparous women. 17 (5). pp. 340-50. PMID 22834648. doi:10.3109/13625187.2012.700744. Texto «journalJournal of Contraception & Reproductive Health Care» ignorado (ayuda)
Steenland, MW; Tepper, NK; Curtis, KM; Kapp, N (noviembre de 2011). «Intrauterine contraceptive insertion postabortion: a systematic review.». Contraception 84 (5): 447-64. PMID 22018119. doi:10.1016/j.contraception.2011.03.007.
Marnach, ML; Long, ME; Casey, PM (marzo de 2013). «Current issues in contraception.». Mayo Clinic proceedings. Mayo Clinic 88 (3): 295-9. PMID 23489454. doi:10.1016/j.mayocp.2013.01.007.
Adams CE, Wald M (agosto de 2009). «Risks and complications of vasectomy». Urol. Clin. North Am. 36 (3): 331-6. PMID 19643235. doi:10.1016/j.ucl.2009.05.009.
Deffieux, X; Morin Surroca, M; Faivre, E; Pages, F; Fernandez, H; Gervaise, A (mayo de 2011). «Tubal anastomosis after tubal sterilization: a review.». Archives of gynecology and obstetrics 283 (5): 1149-58. PMID 21331539. doi:10.1007/s00404-011-1858-1.
Shridharani, A; Sandlow, JI (noviembre de 2010). «Vasectomy reversal versus IVF with sperm retrieval: which is better?». Current Opinion in Urology 20 (6): 503-9. PMID 20852426. doi:10.1097/MOU.0b013e32833f1b35.
Nagler, HM; Jung, H (agosto de 2009). «Factors predicting successful microsurgical vasectomy reversal.». The Urologic clinics of North America 36 (3): 383-90. PMID 19643240. doi:10.1016/j.ucl.2009.05.010.
Grimes, DA; Gallo, MF; Grigorieva, V; Nanda, K; Schulz, KF (18 de octubre de 2004). «Fertility awareness-based methods for contraception.». Cochrane Database of Systematic Reviews (4): CD004860. PMID 15495128. doi:10.1002/14651858.CD004860.pub2.
Freundl, G; Sivin, I; Batár, I (abril de 2010). «State-of-the-art of non-hormonal methods of contraception: IV. Natural family planning.». The European journal of contraception & reproductive health care : the official journal of the European Society of Contraception 15 (2): 113-23. PMID 20141492. doi:10.3109/13625180903545302.
Frank-Herrmann, Petra; Heil, Jörg; Gnoth, Christian; Toledo, Estefania; Baur, Siegfried; Pyper, Cecilia; Jenetzky, Ekkehart; Strowitzki, Thomas et al. (mayo de 2007). «The effectiveness of a fertility awareness based method to avoid pregnancy in relation to a couple's sexual behaviour during the fertile time: a prospective longitudinal study». Human Reproduction 22 (5): 1310-1319. PMID 17314078. doi:10.1093/humrep/dem003.
Jones, RK; Fennell, J; Higgins, JA; Blanchard, K (junio de 2009). «Better than nothing or savvy risk-reduction practice? The importance of withdrawal.». Contraception 79 (6): 407-10. PMID 19442773. doi:10.1016/j.contraception.2008.12.008.
Killick, SR; Leary, C; Trussell, J; Guthrie, KA (marzo de 2011). «Sperm content of pre-ejaculatory fluid.». Human fertility (Cambridge, England) 14 (1): 48-52. PMC 3564677. PMID 21155689. doi:10.3109/14647273.2010.520798.
Murthy, Amitasrigowri S; Harwood, Bryna (2007). Contraception Update (2nd edición). New York: Springer. pp. Abstract. ISBN 978-0-387-32327-5. doi:10.1007/978-0-387-32328-2_12.
Fortenberry, J. Dennis (2005). «The limits of abstinence-only in preventing sexually transmitted infections». Journal of Adolescent Health 36 (4): 269-70. PMID 15780781. doi:10.1016/j.jadohealth.2005.02.001. , which cites:
Brückner, Hannah; Bearman, Peter (2005). «After the promise: The STD consequences of adolescent virginity pledges». Journal of Adolescent Health 36 (4): 271-8. PMID 15780782. doi:10.1016/j.jadohealth.2005.01.005.
Ott, MA; Santelli, JS (octubre de 2007). «Abstinence and abstinence-only education». Current Opinion in Obstetrics and Gynecology 19 (5): 446-52. PMID 17885460. doi:10.1097/GCO.0b013e3282efdc0b.
Duffy, K; Lynch, DA; Santelli, J (diciembre de 2008). «Government support for abstinence-only-until-marriage education.». Clinical pharmacology and therapeutics 84 (6): 746-8. PMID 18923389. doi:10.1038/clpt.2008.188.
Feldmann, J.; Middleman, A. B. (2002). «Adolescent sexuality and sexual behavior». Current Opinion in Obstetrics and Gynecology 14 (5): 489-493. PMID 12401976. doi:10.1097/00001703-200210000-00008.
Van der Wijden, Carla; Brown, Julie; Kleijnen, Jos (8 de octubre de 2008). «Lactational amenorrhea for family planning». Cochrane Database of Systematic Reviews (4): CD001329. PMID 14583931. doi:10.1002/14651858.CD001329.
Leung, Vivian W. Y.; Levine, Marc; Soon, Judith A. (febrero de 2010). «Mechanisms of Action of Hormonal Emergency Contraceptives». Pharmacotherapy 30 (2): 158-168. doi:10.1592/phco.30.2.158. «The evidence strongly supports disruption of ovulation as a mechanism of action. The data suggest that emergency contraceptives are unlikely to act by interfering with implantation».
Cheng, L; Che, Y.; Gülmezoglu, A. M. (Aug 15, 2012). «Interventions for emergency contraception.». Cochrane Database of Systematic Reviews 8: CD001324. PMID 22895920. doi:10.1002/14651858.CD001324.pub4.
Shrader, S. P., Hall, L. N., Ragucci, K. R., Rafie, S. (septiembre de 2011). «Updates in hormonal emergency contraception». Pharmacotherapy 31 (9): 887-95. PMID 21923590. doi:10.1592/phco.31.9.887.
Richardson, A. R.; Maltz, F. N. (enero de 2012). «Ulipristal acetate: review of the efficacy and safety of a newly approved agent for emergency contraception.». Clinical therapeutics 34 (1): 24-36. PMID 22154199. doi:10.1016/j.clinthera.2011.11.012.
Cleland, K., Zhu, H., Goldstruck, N., Cheng, L., Trussel, T. (2012). «The efficacy of intrauterine devices for emergency contraception: a systematic review of 35 years of experience». Human Reproduction 27 (7): 1994-2000. PMID 22570193. doi:10.1093/humrep/des140.
Glasier, A.; Cameron, S. T.; Blithe, D.; Scherrer, B.; Mathe, H.; Levy, D.; Gainer, E.; Ulmann, A. (Oct 2011). «Can we identify women at risk of pregnancy despite using emergency contraception? Data from randomized trials of ulipristal acetate and levonorgestrel.». Contraception 84 (4): 363-7. PMID 21920190. doi:10.1016/j.contraception.2011.02.009.
Cates, W., Steiner, M. J. (2002). «Dual Protection Against Unintended Pregnancy and Sexually Transmitted Infections: What Is the Best Contraceptive Approach?». Sexually Transmitted Diseases 29 (3): 168-174. PMID 11875378. doi:10.1097/00007435-200203000-00007.
Sholapurkar, SL (febrero de 2010). «Is there an ideal interpregnancy interval after a live birth, miscarriage or other adverse pregnancy outcomes?». Journal of Obstetrics and Gynaecology: the journal of the Institute of Obstetrics and Gynaecology 30 (2): 107-10. PMID 20143964. doi:10.3109/01443610903470288.
Lavin, C; Cox, JE (agosto de 2012). «Teen pregnancy prevention: current perspectives.». Current Opinion in Pediatrics 24 (4): 462-9. PMID 22790099. doi:10.1097/MOP.0b013e3283555bee.
Tsui AO, McDonald-Mosley R, Burke AE (abril de 2010). «Family planning and the burden of unintended pregnancies». Epidemiol Rev 32 (1): 152-74. PMC 3115338. PMID 20570955. doi:10.1093/epirev/mxq012.
Darroch, JE (marzo de 2013). «Trends in contraceptive use.». Contraception 87 (3): 259-63. PMID 23040137. doi:10.1016/j.contraception.2012.08.029.
Naz, RK; Rowan, S (junio de 2009). «Update on male contraception.». Current Opinion in Obstetrics and Gynecology 21 (3): 265-9. PMID 19469045. doi:10.1097/gco.0b013e328329247d.
Cleland, JG; Ndugwa, R. P.; Zulu, E. M. (1 de febrero de 2011). «Family planning in sub-Saharan Africa: progress or stagnation?». Bulletin of the World Health Organization 89 (2): 137-43. PMC 3040375. PMID 21346925. doi:10.2471/BLT.10.077925.
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