Direct maxacalcitol injection into hyperplastic parathyroids improves skeletal changes in secondary hyperparathyroidism. - Shiizaki, K.; Hatamura, I.; Negi, S.; Sakaguchi, T.; Saji, F.; Kunimoto, K.; Okamoto, M.; Imazeki, I.; Muragaki, Y.; Akizawa, T. (Kidney International, 2006)