TY - GEN AU - Butland,R J AU - Pang,J AU - Gross,E R AU - Woodcock,A A AU - Geddes,D M TI - Two-, six-, and 12-minute walking tests in respiratory disease SN - 0267-0623 PY - 1982///0807 KW - Humans KW - Lung Diseases, Obstructive KW - diagnosis KW - Middle Aged KW - Physical Exertion KW - Respiratory Tract Diseases KW - Time Factors N1 - Publication Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial UR - https://doi.org/10.1136/bmj.284.6329.1607 ER -