Appetite-suppressant drugs and the risk of primary pulmonary hypertension. International Primary Pulmonary Hypertension Study Group - Abenhaim, L; Moride, Y; Brenot, F; Rich, S; Benichou, J; Kurz, X; Higenbottam, T; Oakley, C; Wouters, E; Aubier, M; Simonneau, G; Begaud, B (N Engl J Med, 1996)