Factor associated with SARS-CoV-2 vaccination serological efficacy in adolescents and adults with Down syndrome: Data from an international, collaborative initiative of the Trisomy 21 Research Society. Issue 4 (April 2023) - Valentini, D.; Carfi, A.; Di Paola, A.; Yarci-Carrión, A.; Villani, Alberto; Real de Asúa, D.