TY - RPRT TI - A positional information gradient of sonic hedgehog is required for flight feather formation in avian wings AU - Busby, L. AU - Aceituno, C. AU - McQueen, C. AU - Rich, C. A. AU - Ros, M. A. AU - Towers, M. PY - 2019 DO - 10.1101/698555 UR - https://www.biorxiv.org/content/10.1101/698555v1 ID - 10.1101/698555 ER -