Response

Chest. 2019 Aug;156(2):416-417. doi: 10.1016/j.chest.2019.04.097.

¹ Centre for Clinical Epidemiology, Lady Davis Institute-Jewish General Hospital, Montreal, QC, Canada; Department of Epidemiology and Biostatistics and Department of Medicine, McGill University, Montreal, QC, Canada. Electronic address: samy.suissa@mcgill.ca.
² Centre for Clinical Epidemiology, Lady Davis Institute-Jewish General Hospital, Montreal, QC, Canada; Department of Epidemiology and Biostatistics and Department of Medicine, McGill University, Montreal, QC, Canada.

No abstract available

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