{HEAD ~ A chromatographic packing material}, which comprises {TAIL ~ microspherical sintered bodies} of hydroxyapatite prepared according to the process 1 
comprises
{ HEAD ~ A chromatographic packing material } , which comprises { TAIL ~ microspherical sintered bodies } of hydroxyapatite prepared according to the process 1
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH