- Dietary habits and risk of ossification of the posterior longitudinal ligaments of the spine (OPLL); findings from a case-control study in Japan. Okamoto, K., Kobashi, G., Washio, M., Sasaki, S., Yokoyama, T., Miyake, Y., Sakamoto, N., Ohta, K., Inaba, Y., Tanaka, H. J. Bone Miner. Metab. (2004)









