A comparative study of two methods of calibrating spirometers for use in field surveys.
D002138:Calibration; D003625:Data Collection / Q000295:instrumentation*; D005541:Forced Expiratory Volume; D006801:Humans; D008722:Methods; D012129:Respiratory Function Tests / Q000295:instrumentation; D013147:Spirometry; D014797:Vital Capacity; D014894:Weights and Measures