1. HFrEF patient activity levels during COVID-19 lockdown: A comparison between physical activity questionnaires and implantable devices data. (11th May 2021) Authors: Tsarouchas, A; Bakogiannis, C; Mouselimis, D; Lazaridis, C; Kelemanis, I; Theofillogiannakos, EK; Pagourelias, ED; Papadopoulos, CE; Fragakis, N; Vassilikos, VP Journal: European journal of preventive cardiology Issue: Volume 28:Supplement 1(2021) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗