ABSTRACT

Erja Rappe, PhD, is Planning Officer, Department of Applied Biology, University of Helsinki, P. O. Box 27, FIN-00014 University of Helsinki, Finland, Europe (E-mail: erja.rappe@helsinki.fi). Paivi Topo, PhD, is Research Director, National Research and Development Centre for Welfare and Health, STAKES, P.O. Box 220, FIN-00531 Helsinki, Finland, Europe (B-mail: paivi.topo@stakes.fi).