From the Clinica Medica Generale e Cardiologia (P.A.M., I.B., G.P., C.L., G.F.G.) and Interdepartmental Centre of Bioclimatology (P.A.M., M.M., S.O., G.M., G.F.G.), University of Florence, Florence; Institute of Biometeorology (M.M., L.M., G.M.), National Research Council, Florence; and Department of Clinical Medicine, Prevention, and Applied Biotechnologies (A.G., G.B., G.C., L.L., G.M., G.P.), University of Milano-Bicocca and Istituto Auxologico Italiano, Milan, Italy. (At 2006-02)