Female female human priority journal Humans 401 article 341 controlled study 336 Male 303 male 297 adult 271 Adult 222 Middle Aged 162 clinical article 123 human cell 116 major clinical study 116 Aged 112 aged 112 protein expression 103 Animals 90 nonhuman 90 Article 89 metabolism 88 Adolescent 74 Argentina 62 Mice 61 mouse 61 animal cell 58 human tissue 58 animal experiment 53 in vitro study 51