Metformin can act as a radiosensitizer in zebrafish xenografts of rectal cancer. Issue 2 (February 2022) - Fernández, Laura Melina; Costa, Bruna; Vieira, Pedro Filipe; Herrando, Alberto Ignacio; Domingos, Hugo; Cunha, Jose Filipe; Parés, Oriol; Heald, Richard; Fior, Rita; Parvaiz, Amjad