Towards a Medication Core Data Set for the Medical Informatics Initiative (MII):Initial Mapping Experience between the German Procedure Classification (OPS) and the Identification of Medicinal Products (IDMP) - Zabka, S.; Ammon, Danny; Ganslandt, T.; Gewehr, Jan Erik; Haverkamp, C.; Kiefer, S.; Lautenbacher, H.; Löbe, Matthias; Thun, S.; Boeker, M. (ODLS, 2019)