Betz, Oliver B, Volker M Betz, Ara Nazarian, Carmencita G Pilapil, Mark S Vrahas, Mary L Bouxsein, Louis C Gerstenfeld, Thomas A Einhorn, and Christopher H Evans. 2006. “Direct Percutaneous Gene Delivery to Enhance Healing of Segmental Bone Defects”. JBJS 88 (2): 355-65.