[1] McMaster Univ, Fac Hlth Sci, Hlth Sci Program, Hamilton, ON L8S 4L8, Canada
[2] Canc Care Ontario, Ontario Cerv Screening Program, Hamilton, ON L8V 5C2, Canada
[3] Juravinski Canc Ctr, Div Gynecol Oncol, Hamilton, ON L8V 5C2, Canada
[4] Morden St Res Serv, Hamilton, ON L8S 4S3, Canada