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Yamamoto, Koichiro, Manami Fujita, Hiroyuki Honda, Yoshihisa Hanayama, Kazuki Tokumasu, Yasuhiro Nakano, Kou Hasegawa, Mikako Obika, et Fumio Otsuka. "Characteristics of Serum Ratios of 1,25-Dihydroxyvitamin D to 25-Hydroxyvitamin D for Assessment of Bone Metabolism." J Endocr Soc 2021.

Yamamoto, Koichiro, et al. "Characteristics of Serum Ratios of 1,25-Dihydroxyvitamin D to 25-Hydroxyvitamin D for Assessment of Bone Metabolism." J Endocr Soc 2021.