article human male Male 575 female 575 Humans 533 adult 505 controlled study 437 priority journal 431 Female 428 Adult 331 aged 219 Middle Aged 214 clinical article 183 major clinical study 168 Aged 165 human cell 162 nonhuman 133 Adolescent 129 Argentina 123 adolescent 121 Animals 115 Child 96 physiology 92 child 90 normal human 90 human experiment 84 middle aged 82 Human 73 animal cell 71