human male priority journal article 431 female 419 Male 396 controlled study 378 Humans 373 adult 345 Female 306 Adult 206 aged 172 Middle Aged 164 major clinical study 158 clinical article 142 human cell 141 nonhuman 123 Aged 122 Article 95 Animals 82 protein expression 80 animal cell 75 Adolescent 70 Argentina 70 animal experiment 66 human tissue 65 mouse 59 adolescent 58 middle aged 56 normal human 55