1. Gareth Thomas (corresponding author), School of Social Sciences, Cardiff University, Glamorgan Building, King Edward VII Avenue, Cardiff, CF10 3WT, UK.
2. Barbara Katz Rothman, The Graduate Center, City University of New York (CUNY), 365 Fifth Avenue, New York, NY 10016, USA.
3. Heather Strange, School of Medicine, Cardiff University, Neuadd Meirionnydd, University Hospital of Wales, Heath Park, Cardiff, CF14 4YS, UK.
4. Joanna Latimer, Department of Sociology, University of York, Heslington, York, North Yorkshire, YO10 5DD, UK.