Duplicate title to Yahara, K., Fukuyo, M., Sasaki, A. ORCID: https://orcid.org/0000-0003-3582-5865, & Kobayashi, I. (2009). Evolutionary maintenance of selfish homing endonuclease genes in the absence of horizontal transfer. Proceedings of the National Academy of Sciences 106 (44) 18861-18866. 10.1073/pnas.0908404106.