Authors: Shoo K Lee; Khalid Aziz; Nalini Singhal; Catherine M Cronin; Andrew James; David S C Lee; Derek Matthew; Arne Ohlsson; Koravangattu Sankaran; Mary Seshia; Anne Synnes; Robin Walker; Robin Whyte; Joanne Langley; Ying C MacNab; Bonnie Stevens; Peter von Dadelszen Journal: CMAJ Date: 2009-08-10 Impact factor: 8.262