Pedro-Botet J, Feliu E, Rozman C, Agustí C, Ribera J M, Bladé J, Martín E, Vives Corrons J L, Mascaró J M
Department of Internal Medicine, University of Barcelona School of Medicine, Spain.
Int J Dermatol. 1988 Apr;27(3):179-80. doi: 10.1111/j.1365-4362.1988.tb04926.x.