Affiliation: | 2. Department of Biostatistics, University of Turku, Turku, Finland;3. Department of Clinical Physiology, University of Turku, Turku, Finland;4. Cardiovascular Research Center, University of Turku, Turku, Finland;5. Department of Clinical Physiology, University of Tampere, Tampere, Finland;11. Department of Pediatrics, University of Oulu, Oulu, Finland;12. Vaasa Central Hospital, Vaasa, Finland;8. Department of Clinical Physiology, University of Kuopio, Kuopio, Finland. |