{HEAD ~ A system} for treating target cells with both positive and negative ions comprises a bi polar beam delivery system configured to create and deliver both positive ion beams and {TAIL ~ negative ion beams} 
{ HEAD ~ A system } for treating target cells with both positive and negative ions comprises a bi polar beam delivery system configured to create and deliver both positive ion beams and { TAIL ~ negative ion beams }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL