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Oka, Yasuko, Mosfequr Rahman, Chihaya Sasakura, Tomoo Waseda, Yukio Watanabe, Ryota Fujii, a Satoru Makinoda. "Prenatal Diagnosis of Fetal Respiratory Function: Evaluation of Fetal Lung Maturity Using Lung-to-liver Signal Intensity Ratio At Magnetic Resonance Imaging." Prenat Diagn 2014.

Oka, Yasuko, et al. "Prenatal Diagnosis of Fetal Respiratory Function: Evaluation of Fetal Lung Maturity Using Lung-to-liver Signal Intensity Ratio At Magnetic Resonance Imaging." Prenat Diagn 2014.