[1] Univ Kuopio, Dept Publ Hlth & Clin Nutr, Family Practice Unit, FI-70211 Kuopio, Finland
[2] Kuopio Univ Hosp, Unit Family Practice, SF-70210 Kuopio, Finland
[3] Univ Kuopio, Ctr Informat Technol, FIN-70211 Kuopio, Finland
[4] State Prov Off Eastern Finland, Kuopio, Finland