1. THE PREVALENCE OF ACNE VULGARIS IN ADOLESCENCE
2. 3 JD. Fallon, SM Olbricht, ME Bigby, and KA Arndt eds. Manual of Clinical Problems in Dermatology , 1st edn . Boston: Little, Brown;1992 : pp. 101 5 .
3. 4 KA. Arndt, KA Arndt, KE Bowers, and AR Chuttani eds. Manual of Dermatologic Therapeutics , 5th edn . Boston: Little, Brown;1992 : pp. 101 5 .