Anaesthesiologists’ guideline adherence in pre-operative evaluation: a retrospective observational study oleh Simone Maria Kagerbauer, Jennifer Wißler, Manfred Blobner, Ferdinand Biegert, Dimislav Ivanov Andonov, Gerhard Schneider, Armin Horst Podtschaske, Bernhard Ulm, Bettina Jungwirth