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European Archives of Oto-Rhino-Laryngology > 2018 > 275 > 4 > 997-1003
European Journal of Orthopaedic Surgery & Traumatology > 2010 > 20 > 5 > 373-380
European Spine Journal > 2007 > 16 > 11 > 1925-1933
Intensive Care Medicine > 2004 > 30 > 8 > 1594-1601