Affiliation: | (1) Department of Pediatrics and University of Toronto, The Hospital for Sick Children, M5G 1X8 Toronto, Ontario, Canada;(2) MRC Group in Reproductive Biology, University Hospital, N6A 5A5 London, Ontario, Canada;(3) Department of Pathology, Ontario Veterinary College, University of Guelph, N1G 2W1 Guelph, Ontario, Canada;(4) Cytogenetics Laboratory, George D. Widener Hospital for Large Animals, New Bolton Center, University of Pennsylvania, 19348 Kennett Square, Pennsylvania, USA |