Acknowledgments
The authors thank Dan Atar (Oslo University Hospital Ullevål, Norway) and Mårten Rosenqvist (Karolinska Institutet and Danderyd Hospital, Sweden) for their contributions to the international advisory committee of the LOOP study. They thank the research nurses and other colleagues in the Departments of Cardiology at Rigshospitalet, Bispebjerg, and Frederiksberg Hospital, Zealand University Hospital, and Odense University Hospital, who assisted with the conduct of the LOOP study.