Peak flow meters still useful but require consistency rather than accuracy.
Connolly
C K
CK
D001249:Asthma / Q000175:diagnosis; D006801:Humans; D010366:Peak Expiratory Flow Rate; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis; D015203:Reproducibility of Results; D012129:Respiratory Function Tests / Q000295:instrumentation*; D012680:Sensitivity and Specificity