1. Departments of Endocrinology, Montecelo Hospital, Pontevedra (P.F.C.), Spain
2. Department of Functional Biology and Health Sciences, University of Vigo (F.M.), Spain
3. Xeral-Cíes Hospital, Vigo (M.A.A., R.V.G.-M.), Spain
4. Department of Physiology, University of Santiago de Compostela (C.D.), Spain