[1] BWH, Div Pharmacoepidemiol & Pharmacoecon, Boston, MA USA
[2] Brigham & Womens Hosp, Div Pharmacoepidemiol & Pharmacoecon, Dept Med, Boston, MA USA
[3] Harvard Med Sch, Boston, MA USA
[4] Brigham & Womens Hosp, Dept Dermatol, Boston, MA USA
[5] George Washington Univ, Dept Dermatol, Sch Med & Hlth Sci, Washington, DC USA