Determinants of anti-S immune response at 6 months after COVID-19 vaccination in a multicentric European cohort of healthcare workers - ORCHESTRA project. - Collatuzzo G; Visci G; Violante FS; Porru S; Spiteri G; Monaco MGL; Larese Fillon F; Negro C; Janke C; Castelletti N; De Palma G; Sansone E; et al. (Frontiers in immunology, 2022)