1. From the Lady Davis Institute for Medical Research (T.B., D.A.K., M.W.L., L.S., P.P., E.L.S.) and Department of Medicine (E.L.S.), Sir Mortimer B. Davis-Jewish General Hospital, McGill University, Montreal, Quebec, Canada; Université d'Avignon et des Pays de Vaucluse (T.B., P.L.), Avignon, France; State University of Rio de Janeiro (D.A.K., M.F.N.), Rio de Janeiro, Brazil.