作者单位:School of Health and Life Sciences, Glasgow Caledonian UniversityGlasgow,UK[1]Health Protection ScotlandGlasgow,UK[2]School of Media, Society and CultureUniversity of the West of ScotlandPaisley,UK[3]School of Social SciencesUniversity of the West of ScotlandPaisley,UK[4]Population Health Sciences, Bristol Medical School, University of BristolBristol,UK[5]