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Billinger, Michael; Schwerzmann, Markus; Rutishauser, Wilhelm; Wahl, Andreas; Windecker, Stephan; Meier, Bernhard; Seiler, Christian (2013). Patent foramen ovale screening by ear oximetry in divers. American journal of cardiology, 111(2), pp. 286-90. New York, N.Y.: Elsevier 10.1016/j.amjcard.2012.09.030
