TY - RPRT TI - Biological age is a universal marker of aging, stress, and frailty AU - Pyrkov, T. V. AU - Fedichev, P. O. PY - 2019 DO - 10.1101/578245 UR - https://www.biorxiv.org/content/10.1101/578245v1 ID - 10.1101/578245 ER -