TY - RPRT TI - Genetic drift opposes mutualism during spatial population expansion AU - Melanie JI Mueller AU - Beverly I Neugeboren AU - David R Nelson AU - Andrew W Murray PY - 2014 DO - 10.1101/003012 UR - https://www.biorxiv.org/content/10.1101/003012v1 ID - 10.1101/003012 ER -