1. Department of Microbiology and Immunology, The University of Western Ontario, London, Ontario, Canada
2. Canadian Research & Development Centre for Probiotics, Lawson Health Research Institute, London, Ontario, Canada
3. Department of Obstetrics and Gynecology, University of Toronto and Mt. Sinai Hospital, University Avenue, Toronto, Ontario, Canada
4. Department of Surgery, The University of Western Ontario, London, Ontario, Canada