¹ Rafael Falabella, M.D., is Professor, Universidad del Valle, Hospital Universitario del Valle, Department of Internal Medicine, Section of Dermatology, Cali, Colombia.

Address reprint requests to Rafael Falabella, M.D., Centro Medico Imbanaco, Carrera 39 No. 5A–177, Cali, Colombia, South America.

Color printing has been made possible by Miles Laboratories of Colombia, S.A.