Authors: Geoffrey A Head; Anastasia S Mihailidou; Karen A Duggan; Lawrence J Beilin; Narelle Berry; Mark A Brown; Alex J Bune; Diane Cowley; John P Chalmers; Peter R C Howe; Jonathan Hodgson; John Ludbrook; Arduino A Mangoni; Barry P McGrath; Mark R Nelson; James E Sharman; Michael Stowasser Journal: BMJ Date: 2010-04-14