human 287 Humans 219 female 161 male 153 Article 128 adult 114 Female 99 Male 97 major clinical study 76 risk factor 76 controlled study 72 aged 70 Risk assessment 65 risk assessment 65 Risk management 64 middle aged 64 COVID-19 57 United States 57 Adult 54 Middle Aged 52 retrospective study 52 Aged 49 follow up 38 procedures 38 Retrospective Studies 36 article 36 China 34 Risk Factors 34 child 33 cohort analysis 33