TY - STAND AU - H. Whittaker AU - S. Kiddle AU - J. Quint BT - Pragmat Obs Res DO - 10.2147/por.s319965 PY - 2021 SP - 119 EP - 130 T2 - Pragmat Obs Res TI - Challenges and Pitfalls of Using Repeat Spirometry Recordings in Routine Primary Care Data to Measure FEV(1) Decline in a COPD Population VL - 12 SN - 1179-7266 (Print) 1179-7266 ER -