1 Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada. Electronic address: jchunghall@uwaterloo.ca.
2 Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada.
3 Department of Primary Care and Public Health, Imperial College London, London, United Kingdom.
4 Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada; School of Public Health Sciences, University of Waterloo, Waterloo, Ontario, Canada; Ontario Institute for Cancer Research, Toronto, Ontario, Canada.