Seiji Ishida, Akiko Takahashi, Noe Matsushima, Jun Yokoyama, Wataru Makino, Jotaro Urabe and Masakado Kawata*
* Corresponding author: Masakado Kawata kawata@m.tohoku.ac.jp
BMC Evolutionary Biology 2011, 11:209 doi:10.1186/1471-2148-11-209