1. Technion Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel and Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, POB 9649, Haifa 31096, Israel
2. Lady Davis Carmel Hospital, Department of Medicine, Haifa, Israel
3. Kaiser Permanente Center for Health Research, Portland, OR, USA
4. Clinical Research Unit, Clalit Health Services, Haifa & Western Galilee, & the Department of Family Medicine, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
5. Clalit Health Services, Haifa & Western Galilee & the Lady Davis Carmel Medical Center, Haifa, Israel
6. Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, POB 9649, Haifa 31096, Israel.