[1] McGill Univ, Ctr Hlth, Royal Victoria Hosp, Chron Viral Illness Serv, Local D02-4110,Glen Site,1001 Decarie Blvd, Montreal, PQ H4A 3J1, Canada
[2] Univ Toronto, Fac Med, Dept Phys Therapy, Toronto, ON, Canada
[3] McGill Univ, Ctr Hlth, Res Inst, Ctr Outcomes Res & Evaluat, Montreal, PQ, Canada
[4] Ctr Hosp Univ Montreal, Ctr Rech, Montreal, PQ, Canada
[5] Univ Montreal, Ecole Sante Publ, Dept gest Evaluat & Polit Sante, Montreal, PQ, Canada
[6] McGill Univ, Fac Med, Dept Epidemiol & Biostat, Montreal, PQ, Canada
[7] McGill Univ, Ctr Hlth, Div Radiat Oncol, Montreal, PQ, Canada
[8] McGill Univ, Dept Family Med, Montreal, PQ, Canada