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Koch, C.; Straub, R; Ramseyer, A; Widmer, A; Robinson, N E; Gerber, V (2007). Endoscopic scoring of the tracheal septum in horses and its clinical relevance for the evaluation of lower airway health in horses. Equine veterinary journal, 39(2), pp. 107-112. Oxford: Wiley-Blackwell 10.2746/042516407X158764
