{{Cite journal| doi = 10.1080/17476348.2022.2042256| issn = 1747-6356 (Electronic) 1747-6348 (Linking)| volume = 16| issue = 3| pages = 323–332| last1 = Doulberis| first1 = M.| last2 = Sampsonas| first2 = F.| last3 = Papaefthymiou| first3 = A.| last4 = Karamouzos| first4 = V.| last5 = Lagadinou| first5 = M.| last6 = Karampitsakos| first6 = T.| last7 = Stratakos| first7 = G.| last8 = Kuntzen| first8 = T.| last9 = Tzouvelekis| first9 = A.| title = High-flow versus conventional nasal cannula oxygen supplementation therapy and risk of hypoxia in gastrointestinal endoscopies: a systematic review and meta-analysis| journal = Expert Rev Respir Med| date = 2022-02-15| pmid = 35157538}}