TY - JOUR AU - Byng, D; Lutter, JI; Wacker, ME TI - Determinants of healthcare utilization and costs in COPD patients: first longitudinal results from the German COPD cohort COSYCONET JO - Int J Chron Obstruct Pulmon Dis VL - 14 PY - 2019 DO - 10.2147/COPD.S201899 L3 - PubMed-ID: 31308648 SP - 1423 EP - 1439 N1 - et al. ER -