Humans Male priority journal human 430 male 383 article 369 Female 336 controlled study 328 female 299 adult 255 Adult 224 Middle Aged 192 nonhuman 123 Animals 121 Aged 120 human cell 112 major clinical study 112 aged 110 clinical article 108 protein expression 79 Argentina 72 Adolescent 70 animal experiment 69 Article 67 Mice 60 animal cell 60 Young Adult 53 human tissue 52 unclassified drug 52 middle aged 50