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Comparative Study
. 1974 Dec;3(4):315-9.
doi: 10.1093/ije/3.4.315.

A comparison of the assessment of simple bronchitis (chronic mucus hypersecretion) by measurements of sputum volume and by standardized questions on phlegm production

C M Fletcher, R Peto, C M Tinker
Comparative Study

A comparison of the assessment of simple bronchitis (chronic mucus hypersecretion) by measurements of sputum volume and by standardized questions on phlegm production

C M Fletcher et al. Int J Epidemiol. 1974 Dec.
No abstract available

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