1. East Suffolk & North Essex NHS Foundation Trust, Ipswich, United Kingdom
2. Norwich Medical School, University of East Anglia, Norwich, United Kingdom
3. MRC/CSO Social and Public Health Sciences Unit & Robertson Centre for Biostatistics, Institute of Health and Well Being, University of Glasgow, Glasgow, United Kingdom
4. Medtronic International Trading Sàrl, Tolochenaz, Switzerland
5. Medtronic BioPharma, Tolochenaz, Switzerland