text: Transfer factor of the lung for carbon monoxide ( TLCO ) was measured by a new method based on analysis of the ratio of the concentrations of carbon monoxide to an inert gas ( methane ) relative to lung volume during a constant exhalation .
entities.text: Transfer factor of the lung for carbon monoxide
entities.type: intervention
entities.text: Transfer factor of the lung for carbon monoxide ( TLCO )
entities.type: outcome
entities.text: ratio of the concentrations of carbon monoxide
entities.type: outcome