Kujala, Urho M MD, PhD*; Sarna, Seppo PhD†; Kaprio, Jaakko MD, PhDâ€
From the *Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland; and the †Department of Public Health, University of Helsinki, Helsinki, Finland.
Received for publication April 2004; accepted March 2005.
Reprints: Urho M. Kujala, MD, PhD, Department of Health Sciences, P.O. Box 35 (LL), FIN-40014, University of Jyväskylä, Jyväskylä, Finland (e-mail: [email protected]).
doi: 10.1097/01.jsm.0000165347.55638.23