“…All but 2 of the 8 papers identified [10,16] were published 10 years ago or more. The 8 papers reviewed comprise: 5 retrospective observational studies/case series [6,10,12,13,15], one cross-sectional study [11], one case report [16] and one letter in reply discussing 2 patients [14]. Four papers made conclusions recommending against the use of VT [6,10,12,15] and 2 papers were in favour of VT for OME in PCD patients [13,14].…”