human 13,420 Humans 10,269 female 7,057 male 6,942 adult 5,820 Article 5,456 controlled study 4,610 Female 4,508 Male 4,293 article 4,088 LB2300 Higher Education 3,471 Adult 2,916 TK Electrical engineering. Electronics Nuclear engineering 2,865 TA Engineering (General). Civil engineering (General) 2,492 major clinical study 2,357 middle aged 2,227 L Education (General) 2,167 TP Chemical technology 2,067 TJ Mechanical engineering and machinery 2,036 procedures 1,929 Middle Aged 1,888 nonhuman 1,883 aged 1,830 young adult 1,760 COVID-19 1,750 adolescent 1,722 human experiment 1,675 Malaysia 1,670 child 1,647 genetics 1,619