[1] Univ Toronto, Dept Lab Med & Pathobiol, Toronto, ON, Canada
[2] Sunnybrook Hlth Sci Ctr, Dept Anat Pathol, Toronto, ON M4N 3M5, Canada
[3] Univ Hlth Network, Toronto Gen Hosp, Lab Med Program, Toronto, ON, Canada
[4] Univ Toronto, Dept Surg, Toronto, ON, Canada
[5] Womens Coll Hosp, Dept Surg, Toronto, ON, Canada
[6] Univ Hlth Network, Toronto, ON, Canada