Gaida, A.A.GaidaHolz, O.O.HolzSchuchardt, S.S.SchuchardtNell, C.C.NellBoas, U.U.BoasLangejürgen, J.J.LangejürgenZimmermann, S.S.ZimmermannKoczulla, A.R.A.R.KoczullaHohlfeld, J.M.J.M.Hohlfeld2022-03-062022-03-062015https://publica.fraunhofer.de/handle/publica/260041en610616620Comparison Of Breath Volatile Organic Compounds Collected From Healthy Controls, Healthy Smokers, Smokers With COPD, And Ex-Smokers With COPD At Two German Centers For Lung Research (dzl)journal article