作者单位: | [1]Department of Medicine and Division of Respiratory Medicine, Vancouver Hospitar and Hearth Science Centre [2]University of British Columbia; Centre for Clinical Epidemiology and Evaluation, Vancouver Hospitar and Hearth Science Centre [3]Vancouver Coastal Health Research Institute; and Pacific Parkinson Research Centre, University of British Columbia , Vancouver, British Columbia. [4]不详, University of British Columbia , Vancouver, British Columbia. |