HEARTFAID's eCRF: Lessons Learnt from Using a Two-Level Data Acquisition and Storage System for Knowledge Discovery Tasks within an Electronic Platform for Managing Heart Failure Patients. - Matko Bosnjak; Andrzej A. Kononowicz; Katarzyna Styczkiewicz; Bogumila Bacior; Rajko Horvat; Marin Prcela; Dragan Gamberger; Angela Sciacqua; Mariaconsuelo Valentini; Kalina Kawecka-Jaszcz; Gianfranco Parati; Domenico Conforti (Bio Algorithms Med Syst., 2009)