Cutoff value of serum 25-hydroxyvitamin D leading to vitamin D deficiency for children in Japan. - Yasuko Ogiwara; Nao Shibata; Akira Ishii; Shinji Higuchi; Keisuke Nagasaki; Hotaka Kamasaki; Tohru Yorifuji; Yukihiro Hasegawa (Clinical Pediatric Endocrinology, 2025)