A definitive diagnosis requires a muscle biopsy but because the symptoms are often non-specific and a biopsy is an invasive procedure, it is usually not performed unless there more significant evidence …

Mar 14, 2016 · When Tiffeneau described the FEV1 in 1947 and Gaensler the timed FVC and FEV1/FVC ratio in 1950 this opened up an entirely new territory for pulmonary investigators to …

Jul 19, 2017 · From an undated photo. Gasometer style indicates it’s from 1920’s.

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