Modelling alveoli on a breathing lung-on-chip in health and disease Clementine Richter, Alberto Hidalgo, Patrick Carius, Nuria Roldan, Janick Stucki, Nina Hobi, Nicole Schneider-Daum, Calus-Michael Lehr European Respiratory Journal 2020 56: 3345; DOI: 10.1183/13993003.congress-2020.3345