1 School of Physiotherapy, Dalhousie University, Halifax, Nova Scotia, Canada.
2 Department of Medicine, McMaster University, Hamilton, Ontario, Canada; GERAS Centre for Aging Research, Hamilton, Ontario, Canada.
3 School of Public Health and Health Systems, University of Waterloo, Waterloo, Ontario, Canada.
4 Department of Medicine, McMaster University, Hamilton, Ontario, Canada.
5 Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada; Schlegel-UW Research Institute for Aging Research, Waterloo, Ontario, Canada.