Building an i2b2-Based Population Repository for COVID-19 Research. - Pedrera-Jimenez M; Garcia-Barrio N; Hernandez-Ibarburu G; Baselga B; Blanco A; Calvo-Boyero F; Gutierrez-Sacristan A; Quiros V; Cruz-Bermudez JL; Bernal JL; Meloni L; Perez-Rey D; et al. (Studies in health technology and informatics, 2022)