Impact of SARS-CoV-2 pre-delta/delta and omicron variants on clinical outcomes in a systemic lupus erythematosus cohort from Puerto Rico. - Serrano-Arroyo, Lilliana; González-Meléndez, Ariana; Ríos-Rivera, Rafael; Rodríguez-González, Valeria; Vilá, Luis M. (Lupus, 2025)