机构:Unit of Academic Primary Care, Warwick Medical School, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK,Dept. of Family Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada,Primary Palliative Care Research Group, Usher Institute of Population Health Scie
机构:British Columbia Centre on Substance Use, Vancouver, British Columbia, Canada; Mailman School of Public Health, Columbia University, New York, USA,British Columbia Centre on Substance Use, Vancouver, British Columbia, Canada; School of Population and Public Health, University of British Columbia, Ca