In {TAIL ~ some embodiments}, {HEAD ~ cells} are genetically modified to increase or decrease bone restructuring 
In { TAIL ~ some embodiments } , { HEAD ~ cells } are genetically modified to increase or decrease bone restructuring
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH