Snooks Helen, Evans Angela, Wells Bridget, Peconi Julie, Thomas Marie, Woollard Malcolm, Guly Henry, Jenkinson Emma, Turner Janette, Hartley-Sharpe Chris
Centre for Health Information, Research and Evaluation, Institute of Life Science, School of Medicine, University of Wales, Swansea SA2 8PP, UK.
Emerg Med J. 2009 Aug;26(8):549-50. doi: 10.1136/emj.2008.065862.