In particular, neuronally differentiated PC12 cells, established from {HEAD ~ pheochromocytoma} of rat adrenal medulla, are used to host {TAIL ~ a persistent viral infection} 
In particular , neuronally differentiated PC12 cells , established from { HEAD ~ pheochromocytoma } of rat adrenal medulla , are used to host { TAIL ~ a persistent viral infection }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL