Longitudinal MRI study over 20 years of cervical posterior extensor muscle area in asymptomatic subjects by Hiroyuki Izumida, Kenshi Daimon, Hitoshi Umezawa, Takehiro Michikawa, Hirokazu Fujiwara, Eijiro Okada, Kenya Nojiri, Hiroyuki Katoh, Kentaro Shimizu, Hiroko Ishihama, Masaya Nakamura, Morio Matsumoto, Kota Watanabe

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