human male priority journal article 438 female 422 Male 402 controlled study 384 Humans 380 adult 350 Female 310 Adult 210 aged 176 Middle Aged 168 major clinical study 158 human cell 146 clinical article 144 nonhuman 128 Aged 126 Article 96 Animals 86 protein expression 84 animal cell 78 Adolescent 70 Argentina 70 animal experiment 68 human tissue 68 mouse 62 adolescent 58 middle aged 56 normal human 56