© 2006 Juuti-Uusitalo et al; licensee BioMed Central Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License.
Ellei muuten mainita, aineiston lisenssi on © 2006 Juuti-Uusitalo et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License.