[1] Cent Satakunta Hlth Federat Municipal, Harjavalta 29200, Finland
[2] Univ Turku, Inst Clin Med, Turku, Finland
[3] Univ Turku, Dept Med, Turku, Finland
[4] Pulssi Med Ctr, Turku, Finland
[5] Satakunta Hosp Dist, Dept Surg, Pori, Finland
[6] Cent Finland Cent Hosp, Dept Family Practice, Jyvaskyla, Finland
[7] Kuopio Univ Hosp, Unit Primary Hlth Care, SF-70210 Kuopio, Finland
[8] Medcare Fdn, Aanekoski, Finland