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nih.gov
ncbi.nlm.nih.gov
B.B.WeiB.B. i inni, The epidemiology of adolescent acne in North East China, „Journal of the European Academy of Dermatology and Venereology: JEADV”, 24 (8), 2010, s. 953–957, DOI: 10.1111/j.1468-3083.2010.03590.x, ISSN1468-3083, PMID: 20337811 [dostęp 2017-09-23].
AR. Shalita, JG. Smith, LC. Parish, MS. Sofman i inni. Topical nicotinamide compared with clindamycin gel in the treatment of inflammatory acne vulgaris.. „Int J Dermatol”. 34 (6), s. 434-7, Jun 1995. PMID: 7657446.
worldcat.org
B.B.WeiB.B. i inni, The epidemiology of adolescent acne in North East China, „Journal of the European Academy of Dermatology and Venereology: JEADV”, 24 (8), 2010, s. 953–957, DOI: 10.1111/j.1468-3083.2010.03590.x, ISSN1468-3083, PMID: 20337811 [dostęp 2017-09-23].