1. From the Departments of Clinical Physiology (H.A., J.H., M.K.), Pediatrics (N.H.-K.), and Clinical Chemistry (T.Le.), University of Tampere and Tampere University Hospital, Tampere, Finland; Departments of Medicine (M.J., J.S.A.V.) and Clinical Physiology (O.T.R.) and the Research Centre of Applied and Preventive Cardiovascular Medicine (M.J., O.T.R.), University of Turku and Turku University Hospital, Turku, Finland; Department of Clinical Physiology and Nuclear Medicine (T.La.), Kuopio University...