1. Canadian Research and Development Centre for Probiotics, F2-116, The Lawson Health Research Institute, 268 Grosvenor Street, London, ON N6A 4V2, Canada
2. Department of Microbiology and Immunology, and Surgery, University of Western Ontario, 1151 Richmond Street, London, ON N6A 3K7, Canada
3. Department of Public Health, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, the Netherlands
4. National Institute for Medical Research, Mwanza, Tanzania