Original Research

The Efficiency Index (EFFi), based on volumetric capnography, may allow for simple diagnosis and grading of COPD

Jarenbäck L, Tufvesson E, Ankerst J, Bjermer L, Jonson B

International Journal of Chronic Obstructive Pulmonary Disease 2018, 13:2033-2039

Published Date: 27 June 2018