[1] Univ Western Ontario, London Reg Canc Program, Med Oncol, London, ON, Canada
[2] Inst Clin Evaluat Sci, Epidemiol, Toronto, ON, Canada
[3] Sunnybrook Odette Canc Ctr, Med Oncol, Toronto, ON, Canada
[4] Publ Hlth Ontario, Epidemiol, Toronto, ON, Canada
[5] Childrens Hosp Eastern Ontario, Lab Med & Pathol, Ottawa, ON, Canada
[6] North York Gen Hosp, Lab Med & Pathol, Toronto, ON, Canada
[7] Mt Sinai Hosp, Lab Med & Pathol, Toronto, ON, Canada
[8] William Osler Heath Ctr, Infect Dis, Toronto, ON, Canada
[9] Hosp Sick Children, Lab Med & Pathol, Toronto, ON, Canada
[10] Sunnybrook Hlth Sci Ctr, Infect Dis, Toronto, ON, Canada
[11] McMaster Univ, Lab Med & Pathol, Hamilton, ON, Canada
[12] Newfoundland & Labrador Publ Hlth Lab, Lab Med & Pathol, St John, NF, Canada
[13] London Hlth Sci Ctr, Lab Med & Pathol, London, ON, Canada