Martínez-Serrano, Maria, Nuria Tormo-Palop, David Navalpotro-Rodríguez, Marta Moreno-Córdoba, Roberto Olmos-Arenas, and Concepción Gimeno-Cardona. 2021. “Characterization of Humoral Response After COVID-19 Infection in an Unvaccinated Cohort”. Archives of Clinical and Biomedical Research 5 (6):959-71. https://fortunejournals.org/ojs/index.php/acbr/article/view/14881.