Dinucleotides and {HEAD ~ their use} as modulators of {TAIL ~ mucociliary clearance} and ciliary beat frequency 
Dinucleotides and { HEAD ~ their use } as modulators of { TAIL ~ mucociliary clearance } and ciliary beat frequency
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH