TY - RPRT TI - Proofreading-deficient coronaviruses adapt over long-term passage for increased fidelity and fitness without reversion of exoribonuclease-inactivating mutations AU - Graepel, K. AU - Lu, X. AU - Case, J. B. AU - Sexton, N. R. AU - Smith, E. C. AU - Denison, M. R. PY - 2017 DO - 10.1101/175562 UR - https://www.biorxiv.org/content/10.1101/175562v1 ID - 10.1101/175562 ER -