RT Journal Article SR Electronic T1 Scientific approach to the treatment of acne vulgaris JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 277 OP 283 VO 42 IS 4 A1 Bergfeld, Wilma F. YR 1975 UL http://www.ccjm.org/content/42/4/277.abstract AB