1. From the Research Centre of Applied and Preventive Cardiovascular Medicine (I.V., M.J.J., M.A., K.K., S.A.), the Departments of Pediatrics (I.V., K.K., O.S.), Clinical Physiology (M.J.J., O.T.R.), Virology (R.V.), and Medicine (T.R., J.V.), University of Turku; the Department of Health and Functional Capacity (J.M.), National Public Health Institute, Turku; and the Department of Internal Medicine (M.J.J.), Satakunta Central Hospital, Pori, Finland.