George Giannakopoulos, Chara Tzavara, Christine Dimitrakaki, Gerasimos Kolaitis, Vasiliki Rotsika and Yannis Tountas*
* Corresponding author: Yannis Tountas chsr.med.uoa@gmail.com
BMC Public Health 2010, 10:57 doi:10.1186/1471-2458-10-57