Two techniques to sample non-volatiles in breath - Exemplified by methadone
The particles in exhaled breath provide a promising matrix for the monitoring of pathological processes in the airways, and also allow exposure to exogenous compounds to be to assessed. The collection is easy to perform and is non-invasive. The aim of the present study is to assess if an exogenous compound - methadone - is distributed in the lining fluid of small airways, and to compare two method