1. Federal University of Sergipe (C.R.P.O., J.A.S.B.-F., I.E.S.R., R.M.C.P., V.C.C., M.M., E.G., R.A.M.-M., V.P.A., N.T.F.L., A.C.N.-J., M.I.T.F., T.A.R.V., R.D.C.A., E.V.M., M.H.A.-O.), Division of Endocrinology, 49060-100 Aracaju, SE, Brazil
2. The John Hopkins University School of Medicine (R.S.), Division of Endocrinology, Baltimore, Maryland 21287
3. and National Research Council (A.M.), 35127 Padova, Italy