UNLOCK: Uncovering and Noting Long-term Outcomes in COPD to enhance knowledge.

a Department of Public Health and Primary Care, Leiden University Medical Center, the Netherlands b Department of Public Health and Caring Sciences, Family Medicine and Clinical Epidemiology, Uppsala University,Sweden c Spanish Primary Care Respiratory Group (GRAP), Spain. d Department of Public Health and General Practice, Norwegian University of Science and Technology, Norway e School of Population Health & Clinical Practice, University of Adelaide, Australia f University of Alberta, Canada g International Primary Care Respiratory Group (IPCRG), United Kingdom h Peninsula Medical School, University of Plymouth, United Kingdom i Department of General Practice, University Medical Center Groningen, the Netherlands j Centre of Academic Primary Care, University of Aberdeen, United Kingdom