Caucasian 5 Humans 5 Male 5 Whites human 5 male 5 Female 3 female 3 Adult 2 Article 2 Hospitalization 2 Middle Aged 2 adult 2 controlled study 2 genetics 2 hospitalization 2 major clinical study 2 middle aged 2 African American 1 African Americans 1 African-American population 1 Age 1 Brazil 1 COVID-19 1 CTLA-4 Antigen 1 CTLA4 1 CTLA4 gene 1 CTLA4 protein, human 1 Cardiovascular Diseases 1 Case-Control Studies 1