{HEAD ~ Magnetic separation apparatus} and methods employing {TAIL ~ an internal magnetic capture gradient} and an external transport force 
employing
{ HEAD ~ Magnetic separation apparatus } and methods employing { TAIL ~ an internal magnetic capture gradient } and an external transport force
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH