Humans Male female male human 574 Female 570 adult 420 article 388 Adult 346 controlled study 344 priority journal 289 Middle Aged 253 Argentina 162 aged 153 Aged 151 major clinical study 147 Adolescent 144 middle aged 132 Article 127 Young Adult 123 adolescent 122 clinical article 116 physiology 110 Child 105 Animals 103 child 97 nonhuman 82 human experiment 74 animal 67 genetics 64