Alpha4 and beta2 subunits of neuronal nicotinic acetylcholine receptor genes are not associated with methamphetamine-use disorder in the Japanese population

Taro Kishi, Masashi Ikeda, Tsuyoshi Kitajima, Yoshio Yamanouchi, Yoko Kinoshita, Kunihiro Kawashima, Toshiya Inada, Mutsuo Harano, Tokutaro Komiyama, Toru Hori, Mitsuhiko Yamada, Masaomi Iyo, Ichiro Sora, Yoshimoto Sekine, Norio Ozaki, Hiroshi Ujike, Nakao Iwata