Campion, Edward W.; Brunham, Robert C.; Gottlieb, Sami L.; Paavonen, Jorma (21. maj 2015). "Pelvic Inflammatory Disease". New England Journal of Medicine. 372 (21): 2039-2048. doi:10.1056/NEJMra1411426. PMID25992748.
Campion, Edward W.; Brunham, Robert C.; Gottlieb, Sami L.; Paavonen, Jorma (21. maj 2015). "Pelvic Inflammatory Disease". New England Journal of Medicine. 372 (21): 2039-2048. doi:10.1056/NEJMra1411426. PMID25992748.