[1] Univ Calgary, Cumming Sch Med, Dept Family Med, Calgary, AB, Canada
[2] Univ Calgary, Hlth Sci Lib, Calgary, AB, Canada
[3] Univ Calgary, Dept Community Hlth Sci, Cumming Sch Med, Calgary, AB, Canada
[4] Univ Calgary, Dept Med, Snyder Inst Chron Dis, Calgary, AB, Canada
[5] Univ Calgary, Dept Microbiol, Snyder Inst Chron Dis, Calgary, AB, Canada
[6] Univ Calgary, Dept Immunol & Infect Dis, Snyder Inst Chron Dis, Calgary, AB, Canada
[7] Univ Calgary, Dept Pathol & Lab Med, Snyder Inst Chron Dis, Calgary, AB, Canada
[8] Univ Calgary, OBrien Inst Publ Hlth, Cumming Sch Med, Calgary, AB, Canada
[9] Alberta Hlth Serv, Calgary, AB, Canada