JG2: an updated version of the Japanese population-specific reference genomeSirawit Sriwichaiin, Satoshi Makino, Takamitsu Funayama, Akihito Otsuki, Junko Kawashima, Yasunobu Okamura, Shu Tadaka, Fumiki Katsuoka, Kazuki Kumada, Shuichi Tsutsumi, Kengo Kinoshita, Masayuki Yamamoto, Gen Tamiya, Jun Takayama