1. North Shore Medical Center; Salem MA USA
2. Department of Medicine; University of Massachusetts Medical School; Worcester MA USA
3. Johns Hopkins Medicine; Howard County General Hospital; Columbia MD USA
4. Department of Medicine; Englewood Hospital and Medical Center; Englewood NJ USA
5. School of Public Health; University of Massachusetts Lowell; Lowell MA USA
6. Department of Medicine; Maimonides Medical Center; Brooklyn NY USA
7. Department of Pediatrics; Bronx-Lebanon Hospital Center; Bronx NY USA
8. INRS-Institut Armand-Frappier; Institut National de la Recherche Scientifique; Laval QC Canada