Butland, R J <br/><br/>
Two-, six-, and 12-minute walking tests in respiratory disease.  [electronic resource] 

 -  British medical journal (Clinical research ed.)  May 1982 
 - 1607-8 p.  digital 
<br/><br/> Publication Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial 
<br/><br/><label>ISSN: </label>0267-0623 
<br/><br/><label>Standard No.: </label>10.1136/bmj.284.6329.1607  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humans<br/>Lung Diseases, Obstructive--diagnosis<br/>Middle Aged<br/>Physical Exertion<br/>Respiratory Tract Diseases--diagnosis<br/>Time Factors