However, it will be understood that other chelators for these ions are also comprehended by the present invention because such other chelators can be readily incorporated into molecules according to {HEAD ~ the present invention} using {TAIL ~ the same chemistry} as used to incorporate DTPA derivatives 
using
However , it will be understood that other chelators for these ions are also comprehended by the present invention because such other chelators can be readily incorporated into molecules according to { HEAD ~ the present invention } using { TAIL ~ the same chemistry } as used to incorporate DTPA derivatives
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