The Hospital for Sick Children, corporately branded as SickKids, is a children's hospital and teaching hospital located on University Avenue in Toronto, Ontario, Canada. It is affiliated with the University of Toronto Faculty of Medicine, and is the second-largest paediatric research hospital in the world, after the Boston Children's Hospital. The hospital's Peter Gilgan Centre for Research and Learning is the largest pediatric research building in the world at 750,000 square feet.