TY - RPRT TI - Ancient origin and complex evolution of porcine endogenous retroviruses AU - Chen, Y. AU - Chen, M. AU - Duan, X. AU - Cui, J. PY - 2018 DO - 10.1101/431858 UR - https://www.biorxiv.org/content/10.1101/431858v1 ID - 10.1101/431858 ER -