@misc{LangeKopkowLuetzneretal., author = {Lange, Toni and Kopkow, Christian and L{\"u}tzner, J{\"o}rg and G{\"u}nther, Klaus-Peter and Gravius, Sascha and Scharf, Hanns-Peter and St{\"o}ve, Johannes and Wagner, Richard and Schmitt, Jochen}, title = {Comparison of different rating scales for the use in Delphi studies: different scales lead to different consensus and show different test-retest reliability}, series = {BMC Medical Research Methodology}, volume = {20}, journal = {BMC Medical Research Methodology}, number = {1}, issn = {1471-2288}, doi = {10.1186/s12874-020-0912-8}, pages = {11}, language = {en} } @misc{LuetznerLangeSchmittetal., author = {L{\"u}tzner, J{\"o}rg and Lange, Toni and Schmitt, Jochen and Kopkow, Christian and Dreinh{\"o}fer, Karsten E and Friederich, Niklaus F. and Gravius, Sascha and Heller, Karl-Dieter and Hube, Robert and Gromnica-Ihle, Erika and Kirschner, Stephan and Kladny, Bernd and Kremer, Michael and Linke, Maike and Malzahn, J{\"u}rgen and Sabatowski, Rainer and Scharf, Hanns-Peter and St{\"o}ve, Johannes and Wagner, Richard and G{\"u}nther, Klaus-Peter}, title = {[The S2k guideline: Indications for knee endoprosthesis : Evidence and consent-based indications for total knee arthroplasty]}, series = {Der Orthop{\"a}de}, volume = {47}, journal = {Der Orthop{\"a}de}, number = {9}, issn = {1433-0431}, doi = {10.1007/s00132-018-3612-x}, pages = {777 -- 781}, language = {en} }