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Swidrak I, Gruber A, Kofler W, Oberhuber W.Swidrak I, et al. Among authors: oberhuber w.Tree Physiol. 2011 May;31(5):483-93. doi: 10.1093/treephys/tpr034. Epub 2011 May 17.Tree Physiol. 2011.PMID: 21593011Free PMC article.