- Correspondence to Dr John You, Departments of Medicine, and Clinical Epidemiology and Biostatistics, McMaster University Medical Centre, 1280 Main Street West, Room HSC-2C8, Hamilton, Ontario, Canada L8S 4K1;
- Received 9 January 2016
- Revised 5 May 2016
- Accepted 3 July 2016
- Published online 22 February 2017.
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