Hetzel, J. et al. 2021. Bronchoscopic performance of bronchoalveolar lavage in Germany – a call for standardization: A request for BAL standardization . Sarcoidosis, Vasculitis and Diffuse Lung Diseases. 38, 1 (Mar. 2021), e2021003. DOI:https://doi.org/10.36141/svdld.v38i1.10628.