Chatzidimitriou A, Minga E, Chatzikonstantinou T, Moreno C, Stamatopoulos K, Ghia P. Challenges and Solutions for Collecting and Analyzing Real World Data: The Eric CLL Database as an Illustrative Example. Hemasphere. 2020 Sep 30;4(5):e425. PMID: 33709059. doi: 10.1097/HS9.0000000000000425.