title: NIH to require balanced sex representation in animal and cell studies.
mesh_terms: D032761:Animal Experimentation / Q000592:standards; D000818:Animals; D000830:Animals, Laboratory; D005260:Female; D017408:Guidelines as Topic; D007756:Laboratory Animal Science / Q000379:methods*; D008297:Male; D023421:Models, Animal; D009316:National Institutes of Health (U.S.); D015983:Selection Bias; D012727:Sex Characteristics; D014481:United States