@article{oai:tohoku.repo.nii.ac.jp:00021606,
 author = {Zhang, Xiaoyong and Chikushima, Norimasa and Watanabe, Atsutoshi and Ohashi, Yuji and Hasegawa, Nao and Ichiji, Kei and Tamura, Atsushi and Osanai, Makoto and Homma, Noriyasu},
 issue = {1},
 journal = {東北大学医学部保健学科紀要},
 month = {Jan},
 note = {紀要類 (bulletin)},
 pages = {45--51},
 title = {Is Mammographic Breast Density a Risk Factor for Breast Cancer in Japanese Women ?},
 volume = {24},
 year = {2015}
}