Chronic obstructive pulmonary disease education in pulmonary rehabilitation. An Official American Thoracic Society/Thoracic Society of Australia and New Zealand/Canadian Thoracic Society/British Thoracic Society Workshop report - Blackstock, F C; Lareau, S C; Nici, L; American Thoracic Society, Thoracic Society of Australia and New Zealand, Canadian Thoracic Society, and British Thoracic Society (Ann Am Thorac Soc, 2018)