aDepartment of Anesthesia, University of Toronto, Toronto
bDepartment of Clinical Epidemiology and Biostatistics, McMaster University
cPopulation Health Research Institute, Hamilton Health Sciences and McMaster University, Hamilton, Ontario, Canada
dBiomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
eDepartment of Medicine, McMaster University, Hamilton, Ontario, Canada
Correspondence to Dr P.J. Devereaux, Associate Professor, Department of Clinical Epidemiology and Biostatistics and Medicine, McMaster University, Scientific Leader of the Population Health Research Institute's Perioperative Medicine and Surgical Research Unit, 237 Barton Street East, David Braley Research Building, Hamilton, ON L8L 2X2, Canada. Tel: +1 905 527 4322 x40654; fax: +1 905 297 3778; e-mail: [email protected]