- Correspondence to Prof Samy Suissa, Department of Epidemiology and Biostatistics, Centre for Clinical Epidemiology, Lady Davis Institute, Jewish General Hospital, McGill University, 3755 Cote Ste-Catherine, H-461, Montréal, Québec, Canada H3T 1E2;
- Received February 20, 2013
- Accepted February 21, 2013
- First published March 22, 2013.
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