1. Royal Glamorgan Hospital, Cardiff, UK
2. Institute of Medical Sciences, Faculty of Medicine, Health and Social Sciences, Canterbury Christ Church University, Kent, UK
3. Freeman Hospital, Newcastle, UK
4. SCRABEL, Institute of Medical Sciences, Faculty of Medicine, Health and Social Sciences, Canterbury Christ Church University, Kent, UK
5. Darent Valley Hospital, Darenth Wood Road, Dartford DA2 8DA, UK. Canterbury Christ Church University, Kent, UK