Affiliation: | (1) Consultant, Critical Care Unit, Heart of England NHS Foundation Trust (Teaching), Birmingham Heartlands Hospital, Bordesley Green East, Birmingham, B9 5SS, UK;(2) Research co-ordinator, Critical Care Unit, Heart of England NHS Foundation Trust (Teaching), Birmingham Heartlands Hospital, Bordesley Green East, Birmingham, B9 5SS, UK;(3) Consultant, Critical Care Unit, Good Hope NHS Trust (Teaching), Rectory Road, Sutton Coldfield, B75 7RR, UK;(4) Nursing consultant, Critical Care Unit, Heart of England NHS Foundation Trust (Teaching), Birmingham Heartlands Hospital, Bordesley Green East, Birmingham, B9 5SS, UK;(5) Clinical nurse specialist, Critical Care Unit, Good Hope NHS Trust (Teaching), Rectory Road, Sutton Coldfield, B75 7RR, UK |