1. Department of Pediatrics (L.G.G., N.H., V.A., W.L.M.), University of California San Francisco, San Francisco, California 94143-0978
2. Department of Endocrinology-LIM42 (L.G.G., B.B.M., T.A.S.S.B.), Hospital das Clinicas da Universidade de São Paulo, 05403-900 São Paulo, Brazil