[1] Pori Hlth Ctr, Pori 28300, Finland
[2] Satakunta Hosp Distract, Pori, Finland
[3] Kuopio Univ Hosp, Unit Primary Healthcare, Cent Finland Cent Hosp, Unit Family Practice, SF-70210 Kuopio, Finland
[4] Medcare Fdn, Aanekoski, Finland
[5] Univ Turku, Cent Satakunta Hlth Federat Municipal, Harjavalta, Finland