1. Department of Community Health Sciences; University of Manitoba; Health Sciences Centre, GF 533; 820 Sherbrook Street Winnipeg MB R3A 1R9 Canada
2. Department of Biostatistics; School of Public Health; University of Alabama at Birmingham; Birmingham AL
3. Dignity Health St. Joseph's Hospital and Medical Center; Phoenix AZ
4. Department of Community Health Sciences and Department of Internal Medicine; University of Manitoba; Winnipeg Manitoba Canada