Data Interoperability in COVID-19 Vaccine Trials: Methodological Approach in the VACCELERATE Project - Salma Malik; Zoi Pana Dorothea; Christos D Argyropoulos; Sophia Themistocleous; Alan J Macken; Olena Valdenmaiier; Frank Scheckenbach; Elena Bardach; Andrea Pfeiffer; Katherine Loens; Jordi Cano Ochando; Oliver A Cornely; et al. (JMIR Medical Informatics)