Cytotoxic Effects of the Radiocontrast Agent Iotrolan and Anesthetic Agents Bupivacaine and Lidocaine in Three-Dimensional Cultures of Human Intervertebral Disc Nucleus Pulposus Cells: Identification of the Apoptotic PathwaysKoji Iwasaki, Norimasa Iwasaki|PLoS ONE|2014Cited by 22