human 337 Humans 256 female 196 male 185 Article 156 adult 145 Female 119 Male 114 major clinical study 95 risk factor 95 aged 89 controlled study 88 risk assessment 83 Risk management 82 middle aged 81 Risk assessment 76 Adult 68 Middle Aged 65 COVID-19 63 retrospective study 59 Malaysia 58 United States 57 Aged 56 cross-sectional study 48 article 46 Risk Factors 44 follow up 42 procedures 42 Retrospective Studies 41 cohort analysis 40