4WeiB,PangY, ZhuH,etal.Theepidemiologyo fadolescentacne in North East China[J].J Eur Aead Dermatol Venereol,2010, 24(8):953-957.
5ShenY, WangT, ZhouC,etal.Prevalence of acne vulgaris in Chinese adolescents and adults:acommunity-based study of 17,345 subjects in six cities[J].Acta Derm Venereol,2012, 92(1):40-44.
6Jadad A R,Moor R A,Carroll D,et al.Assessing the quality of reportsof randomized clinical trials:Is blinding necessary? Control ClinTrials,1996,17(1): 1-12.
