Zaichick Vladimir, Zaichick Sofia, Age-Dependence of Some Trace Element Concentrations and their Ratios in Human Prostatic Fluid, Journal of Aging Research And Healthcare, Volume 2, Issue 4, 2019, Pages 11-20, ISSN 2474-7785, https://doi.org/10.14302/issn.2474-7785.jarh-19-2910. (https://jndc-chemistryarticles.infojarh/article/1134) Keywords: variations with age in composition of human prostatic fluid; trace element concentration; trace element concentration ratios; energy dispersive X-ray fluorescent analysis