1. Department of Social Medicine, School of Medicine, University of Crete, P.O. Box 2208, 71003 Iraklion, Crete, Greece
2. The Al-Quds Nutrition and Health Research Center, Al-Quds University, P.O. Box 20760, Jerusalem, Palestine
3. Faculty of Medicine, Al-Quds University, P.O. Box 51000, Jerusalem, Palestine
4. Faculty of Medicine, An-Najah National University, P.O. Box 7, Nablus, West Bank, Palestine
5. Jean Mayer USDA Human Nutrition Research Centre, Tufts University, 711 Washington street, Boston, MA 02111, USA