1. From the Research Center of Applied & Preventive Cardiovascular Medicine (T.T.L., K.P., C.G.M., M.O., O.T.R., M.J.), Paavo Nurmi Center, Sports & Exercise Medicine Unit (K.P.), and Departments of Clinical Physiology (O.T.R.) and Medicine (J.S.A.V., M.J.), University of Turku, Turku, Finland; Menzies Research Institute, University of Tasmania, Hobart, Australia (C.G.M.); Department of Pediatrics, Vaasa Central Hospital, Vaasa, Finland (L.T.) and Department of Pediatrics, University of Oulu,...