National concerns.
Ramsdale
Helen
H
Canadian Thoracic Society, Ottawa, Canada.
D002170:Canada; D005260:Female; D033161:Government Regulation; D006801:Humans; D008297:Male; D009313:National Health Programs / Q000592:standards; D012955:Societies, Medical / Q000592:standards* / Q000639:trends; D013903:Thoracic Surgery