human Humans 10,254 female 6,811 male 6,527 adult 5,679 Article 4,441 Female 4,385 Male 4,110 controlled study 3,783 article 3,119 Adult 2,912 major clinical study 2,349 middle aged 2,225 Middle Aged 1,888 aged 1,823 young adult 1,752 procedures 1,708 adolescent 1,701 human experiment 1,673 child 1,635 Young Adult 1,577 Adolescent 1,487 clinical article 1,352 physiology 1,315 Aged 1,254 Child 1,238 genetics 1,139 psychology 1,109 diagnostic imaging 1,075 questionnaire 935