[1
]
Health Services Research Unit, University of Aberdeen, kirsty.loudon@abdn.ac.uk.
[2
]
Health Services Research Unit, University of Aberdeen.
[3
]
North York General Hospital, Toronto, ON M2K 1E1, Canada.
[4
]
Division of Population Health Sciences, University of Dundee, Dundee DD2 4BF, UK.
[5
]
Dalla Lana School of Public Health, University of Toronto; Applied Health Research
Centre (AHRC), Li Ka Shing Knowledge Institute of St Michael's, Toronto, Canada.
[6
]
Centre for Studies in Family Medicine, Schulich School of Medicine & Dentistry, Western
University, Western Centre for Public Health and Family Medicine, London, ON N6A 3K7,
Canada.