[1] Univ Birmingham, Inst Clin Sci, Sch Nursing, Nursing, Birmingham B15 2TT, W Midlands, England
[2] Univ Birmingham, Inst Clin Sci, Sch Nursing, Child Protect, Birmingham B15 2TT, W Midlands, England
[3] Birmingham Childrens Hosp NHS Fdn Trust, Birmingham B4 6NH, W Midlands, England