1. Northern Deanery, Goldcrest Way, Newcastle-upon-Tyne, NE15 8NY, UK.
2. Newcastle University, Claremont Road, Newcastle-upon-Tyne NE1 7RU, UK.
3. ANCA Medical Centre, Krijgslaan 181, 9000 Ghent, Belgium.
4. Freeman Hospital, Freeman Road, High Heaton, Newcastle-upon-Tyne NE7 7DN, UK.
5. University Hospital of North Tees, Hardwick Road, Stockton-on-Tees TS19 8PE, UK.