@misc{indiciaeadcf48aaee07, title = {[ENT relevant changes in the German OPS Procedure Classification System for 2006].}, author = {J Alberty and D Franz}, year = {2006}, doi = {10.1055/s-2006-925196}, url = {https://pubmed.ncbi.nlm.nih.gov/16612749/}, note = {Source identifier: 16612749} }