1 From the Hospital Universitario Central de Asturias (M.G.D., S.C., E.M.), Oviedo, Spain; and Clinique Valmont (J.B.), Glion-Montreux, Switzerland. mglezdelgado@yahoo.es.
2 From the Hospital Universitario Central de Asturias (M.G.D., S.C., E.M.), Oviedo, Spain; and Clinique Valmont (J.B.), Glion-Montreux, Switzerland.