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Urban M, Burghuber OC, Dereci C, Aydogan M, Selimovic E, Catic S, Funk GC.Urban M, et al. Among authors: funk gc.BMJ Open. 2015 Jun 4;5(6):e006510. doi: 10.1136/bmjopen-2014-006510.BMJ Open. 2015.PMID: 26044757Free PMC article.