TY - STAND AU - S. Suissa AU - S. Dell'Aniello AU - P. Ernst BT - Copd DO - 10.1080/15412555.2021.1877649 M1 - 1 PY - 2021 SP - 1 EP - 8 T2 - Copd TI - Comparative Effectiveness of Initial LAMA versus LABA in COPD: Real-World Cohort Study VL - 18 SN - 1541-2563 ER -