[1] Hamilton Gen Hosp, Core Lab, Hamilton, ON, Canada
[2] Lab Serv, External Qual Assessment Qual Management Program, Toronto, ON, Canada
[3] London Hlth Sci Ctr, Dept Hematol, London, ON, Canada
[4] Lab Serv, Qual Management Program, Toronto, ON, Canada
[5] Hamilton Gen Hosp, Hamilton Reg Lab, Program Med, Hamilton, ON, Canada
[6] McMaster Univ, Dept Med, Hamilton, ON, Canada
[7] McMaster Univ, Dept Pathol, Hamilton, ON, Canada