Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Crook, Sarah; Büsching, Gilbert; Schultz, Konrad; Lehbert, Nicola; Jelusic, Danijel; Keusch, Stephan; Wittmann, Michael; Schuler, Michael; Radtke, Thomas; Frey, Martin; Turk, Alexander; Puhan, Milo A; Frei, Anja (2017). A multicentre validation of the 1-min sit-to-stand test in patients with COPD. European Respiratory Journal, 49(3):1601871.