Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
FLETCHER C. M.,Standardised questionnaire on respiratory symptoms : a statement prepared and approved by the MRC Committee on the Aetiology of Chronic Bronchitis (MRC breathlessness score),BMJ,,,1960,2,,1665,https://cir.nii.ac.jp/crid/1574231875649636992,