Humans human major clinical study priority journal Female 114 Male 112 article 108 male 106 controlled study 104 female 104 adult 98 Middle Aged 88 Adult 82 Aged 60 aged 56 Argentina 46 Adolescent 28 Article 20 adolescent 20 human tissue 20 Aged, 80 and over 18 Case-Control Studies 18 Child 18 human cell 18 middle aged 18 Animals 16 disease association 16 unclassified drug 16 Follow-Up Studies 14 Severity of Illness Index 14