- Correspondence to Dr David Hammond, School of Public Health & Health Systems, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1;
- Received 21 March 2016
- Revised 5 August 2016
- Accepted 10 August 2016
- Published in print 1 March 2017.
- Published online 21 March 2017.
- Published first 13 September 2016.
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