Acknowledgements
We would like to thank the participants for sharing their experiences and express our sincere gratitude to the staff who carried out the SAFA trial at recruiting centres including; hospital dermatology centres recruiting for the study: Queen Elizabeth Hospital, Birmingham; Bristol Royal Infirmary Dermatology Centre, Bristol; University Hospital of Wales, Cardiff; General Hospital, Epsom; District Hospital, Harrogate; St Mary’s Hospital (Imperial College NHS Healthcare Trust), London; Queen’s Medical Centre, Nottingham; General Hospital, Poole; St Mary’s General Hospital Dermatology Centre, Portsmouth; Swansea Bay University Health Board, Swansea; participant identification centres (PICs) for searching their patient lists and mail outs and clinical research networks for helping to identify potential PICs.