1. GlaxoSmithKline; Research Triangle Park NC U.S.A.
2. Consultant epidemiologist; Chapel Hill NC U.S.A.
3. GlaxoSmithKline; Stockley Park U.K.
4. South Tees Hospitals NHS Foundation Trust; Northallerton U.K.
5. Nottingham University Hospitals NHS Trust; Nottingham U.K.