SICK KIDS HOSPITAL - PETER GILGALIN CENTRE FOR RESEARCH AND LEARNING, Located at 686 Bay Street, Toronto, ON is believed to be the largest health centre in the world devoted to children's health research. Within the 21-storey tower, more than 2,000 scientists and staff — previously scattered in six different locations — are conducting state-of-the-art research in genomics, cancer research, stem cell research, brain behaviour research, and organ research.