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<http://webisa.webdatacommons.org/298113895>	<http://www.w3.org/ns/prov#value>	"Regardless, the system, including the tracking and navigation system 12, allows for a substantial precise determination of the spinal midline 316 for substantially precise positioning of the disc prosthesis." .
<http://webisa.webdatacommons.org/prov/484572635>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/298113895> .