NEW YORK – The risk of heroin-related behaviors is higher among whites who used non-medical prescription opioids such as oxycontin in prior years, according to researchers at Columbia University Mailman School of Public Health. The findings were race-specific,...

LUND, Sweden—Signal molecule retinoic acid, a product of vitamin A, influences how different tissues are formed in embryos, according to a study from Lund University. Researchers have shown for the first time how vitamin A affects human embryo blood cell formation by...