1. General Practice, Department of Cardiology, Academic Medical Center, Meibergdreef 15, 1105 AZ, DD Amsterdam, Netherlands
2. Medical Library, Department of Cardiology, Academic Medical Center, Meibergdreef 15, 1105 AZ, DD Amsterdam, Netherlands
3. Heart Center, Department of Cardiology, Academic Medical Center, Meibergdreef 15, 1105 AZ, DD Amsterdam, Netherlands