Factors related to elevated serum immunoglobulin G4 (IgG4) levels in a Japanese general population oleh Shunsuke Tsuge, Hiroshi Fujii, Mami Tamai, Hiromasa Tsujiguchi, Misaki Yoshida, Nobuhiro Suzuki, Yoshinori Takahashi, Akari Takeji, Shigeto Horita, Yuhei Fujisawa, Takahiro Matsunaga, Takeshi Zoshima, Ryo Nishioka, Hiromi Nuka, Satoshi Hara, Yukiko Tani, Yasunori Suzuki, Kiyoaki Ito, Kazunori Yamada, Satoshi Nakazaki, Akinori Hara, Atsushi Kawakami, Hiroyuki Nakamura, Ichiro Mizushima, Yasunori Iwata, Mitsuhiro Kawano