1. Centre for Occupational and Environmental Health, Division of Population Health, Health Services Research & Primary Care, School of Health Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PL United King
2. Centre for Biostatistics, Division of Population Health, Health Services Research & Primary Care, School of Health Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PL United Kingdom
3. Dalton Nuclear Institute, Pariser Building, Manchester, M13 9PL United Kingdom
4. VO Consulting, Swakopmund, Namibia