{{Cite journal| doi = 10.1161/JAHA.120.020031| issn = 2047-9980 (Electronic) 2047-9980 (Linking)| volume = 10| issue = 10| pages = –020031| last1 = Ratmann| first1 = P. D.| last2 = Boeddinghaus| first2 = J.| last3 = Nestelberger| first3 = T.| last4 = Lopez-Ayala| first4 = P.| last5 = Koechlin| first5 = L.| last6 = Wildi| first6 = K.| last7 = Miro| first7 = O.| last8 = Martin-Sanchez| first8 = F. J.| last9 = Christ| first9 = M.| last10 = Twerenbold| first10 = R.| last11 = Rubini Gimenez| first11 = M.| last12 = Keller| first12 = D. I.| last13 = Mueller| first13 = C.| last14 = Advantageous Predictors of Acute Coronary Syndrome Evaluation Investigators| first14 = dagger| title = External Validation of the No Objective Testing Rules in Acute Chest Pain| journal = J Am Heart Assoc| date = 2021-05-13| pmid = 33977760}}