Authors: Cathy Shipman; Marjolein Gysels; Patrick White; Allison Worth; Scott A Murray; Stephen Barclay; Sarah Forrest; Jonathan Shepherd; Jeremy Dale; Steve Dewar; Marilyn Peters; Suzanne White; Alison Richardson; Karl Lorenz; Jonathan Koffman; Irene J Higginson Journal: BMJ Date: 2008-10-01