human 6 Humans 5 Article 3 COVID-19 3 disease severity 3 female 3 genetics 3 male 3 Aged 2 Computational Biology 2 Nursing homes 2 Sevilla 2 Seville 2 aged 2 biology 2 coronavirus disease 2019 2 follow up 2 gene mutation 2 genetic variability 2 genome-wide association study 2 hospitalization 2 major clinical study 2 metabolism 2 non insulin dependent diabetes mellitus 2 phenotype 2 prevalence 2 procedures 2 risk factor 2 single nucleotide polymorphism 2 Aeruginosa 1