[1] Oxford Brookes Univ, Nursing, Oxford, England
[2] Natl Inst Hlth & Care Res, London, England
[3] South Tees Hosp NHS Fdn Trust, Clin Res Network North East North Cumbria, Middlesbrough, England
[4] United Hosp Bristol & Weston, Bristol Royal Hosp Children, Fac Nurse Educ, Bristol, England
[5] Oxford Univ Hosp, Oxford, England
[6] Univ Liverpool, Pain Res Inst, Sch Hlth Sci, Nursing, Liverpool, England
[7] Univ Liverpool, Pain Res Inst, Sch Hlth Sci, Nursing Res & Acad Dev, Liverpool, England
[8] Liverpool Univ Hosp NHS Fdn Trust, Liverpool, England
[9] Clin Res Network North East North Cumbria, NMAHP Res, Newcastle Upon Tyne, England
[10] South Tees Hosp NHS Fdn Trust, Natl Inst Hlth & Care Res, Middlesbrough, England
[11] Univ Leeds, Childrens Res Team, Leeds, England
[12] Leeds Teaching Hosp NHS Trust, Leeds, England
[13] Nottingham Univ Hosp NHS Trust, Nottingham, England
[14] Natl Inst Hlth & Care Res, Nursing & Midwifery, London, England
[15] South Tees Hosp NHS Fdn Trust, Marton Rd, Middlesbrough TS4 3BW, England