1. SUNY Upstate Medical University; Department of Family Medicine; 475 Irving Ave Suite 200 Syracuse New York USA 13210
2. 13237 Thoroughbred Dr Dade City FL USA 33525
3. Stony Brook University School of Medicine; Departments of Pediatrics (Emergency) and Emergency Medicine; Stony Brook New York USA 11794
4. Instituto Mexicano del Seguro Social; Clinical Epidemiology Research Unit; Mexico City DF Mexico CP 06470
5. VU University Medical Center; Department of General Practice and Elderly Care Medicine, EMGO Institute for Health and Care Research; PO Box 7057 Amsterdam Netherlands 1007 MB