Authors: Ian G Stiell; Lisa P Nesbitt; William Pickett; Douglas Munkley; Daniel W Spaite; Jane Banek; Brian Field; Lorraine Luinstra-Toohey; Justin Maloney; Jon Dreyer; Marion Lyver; Tony Campeau; George A Wells Journal: CMAJ Date: 2008-04-22 Impact factor: 8.262