 {{Cite journal| doi = 10.1016/j.cgh.2021.12.025| issn = 1542-7714 (Electronic) 1542-3565 (Linking)| volume = 20| issue = 10| pages = 2243–2257| last1 = Nyssen| first1 = O. P.| last2 = Vaira| first2 = D.| last3 = Perez Aisa| first3 = A.| last4 = Rodrigo| first4 = L.| last5 = Castro-Fernandez| first5 = M.| last6 = Jonaitis| first6 = L.| last7 = Tepes| first7 = B.| last8 = Vologzhanina| first8 = L.| last9 = Caldas| first9 = M.| last10 = Lanas| first10 = A.| last11 = Lucendo| first11 = A. J.| last12 = Bujanda| first12 = L.| last13 = Ortuno| first13 = J.| last14 = Barrio| first14 = J.| last15 = Huguet| first15 = J. M.| last16 = Voynovan| first16 = I.| last17 = Lasala| first17 = J. P.| last18 = Sarsenbaeva| first18 = A. S.| last19 = Fernandez-Salazar| first19 = L.| last20 = Molina-Infante| first20 = J.| last21 = Jurecic| first21 = N. B.| last22 = Areia| first22 = M.| last23 = Gasbarrini| first23 = A.| last24 = Kupcinskas| first24 = J.| last25 = Bordin| first25 = D.| last26 = Marcos-Pinto| first26 = R.| last27 = Lerang| first27 = F.| last28 = Leja| first28 = M.| last29 = Buzas| first29 = G. M.| last30 = Niv| first30 = Y.| last31 = Rokkas| first31 = T.| last32 = Phull| first32 = P.| last33 = Smith| first33 = S.| last34 = Shvets| first34 = O.| last35 = Venerito| first35 = M.| last36 = Milivojevic| first36 = V.| last37 = Simsek| first37 = I.| last38 = Lamy| first38 = V.| last39 = Bytzer| first39 = P.| last40 = Boyanova| first40 = L.| last41 = Kunovsky| first41 = L.| last42 = Beglinger| first42 = C.| last43 = Doulberis| first43 = M.| last44 = Marlicz| first44 = W.| last45 = Goldis| first45 = A.| last46 = Tonkic| first46 = A.| last47 = Capelle| first47 = L.| last48 = Puig| first48 = I.| last49 = Megraud| first49 = F.| last50 = Morain| first50 = C. O.| last51 = Gisbert| first51 = J. P.| last52 = European Registry on Helicobacter pylori Management Hp-EuReg| first52 = Investigators| title = Empirical Second-Line Therapy in 5000 Patients of the European Registry on Helicobacter pylori Management (Hp-EuReg)| journal = Clin Gastroenterol Hepatol| date = 2021-12-27| pmid = 34954341}}