Response

Chest. 2014 Jan;145(1):186-187. doi: 10.1378/chest.13-2229.

¹ Queen's University, Kingston, ON, Canada; Kingston General Hospital, Kingston, ON, Canada. Electronic address: mdl@queensu.ca.
² Queen's University, Kingston, ON, Canada; Kingston General Hospital, Kingston, ON, Canada.
³ Queen's University, Calgary, AB, Canada; Kingston General Hospital, Calgary, AB, Canada; University of Calgary, Calgary, AB, Canada.
⁴ Walsh & Associates Occupational Health Services, Ltd, Belleville, ON, Canada.
⁵ Queen's University, Kingston, ON, Canada.
⁶ Gage Occupational and Environmental Health Unit, Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.

No abstract available

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