1. Department of Dermatology; Amersham Hospital; Buckinghamshire Healthcare NHS Trust; Amersham HP7 0JD U.K
2. Search Dogs UK; 9 Church Road Thornton-Cleveleys Lancashire FY5 2TX U.K
3. Department of Statistical Science; University College London; Gower Street London WC1E 6BT U.K
4. Department of Dermatology; Churchill Hospital; Oxford University Hospitals NHS Foundation Trust; Oxford OX3 7LE U.K
5. Faculty of Medicine and Health Sciences; Linköping University; 581 83 Linköping Sweden