Affiliation: | 1. University of Manchester, Centre for Primary Care Research, Department of General Practice, Rusholme Health Centre , Walmer Street, Manchester, M14 5NP;2. Centre for Organizational Health and Development, Department of Psychology, University of Nottingham , Nottingham, NG7 2RD;3. MRC/ESRC Social and Applied Psychology Unit, University of Sheffield , S10 2TN |