Maede Yukiko, Morishita Keiichi, Iwamura Kunihiro, Takayama Yukiko, Tsukada Yuriko, Kishino Maiko, Shimizu Takeshi, Matsushima Shouzou, Komatsu Tatsuji, Kasagi Youko
Department of clinical research, National Hospital Organization Yokohama Medical Center, Yokohama.
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