TY - STAND AU - J. Quint AU - C. O\textquoterightLeary AU - A. Venerus AU - U. Holmgren AU - P. Varghese AU - C. Cabrera BT - Pulm Ther DO - 10.1007/s41030-020-00139-0 PY - 2020 T2 - Pulm Ther TI - Development and Validation of a Method to Estimate COPD Severity in Multiple Datasets: A Retrospective Study SN - 2364-1754 ER -