Implementation of a piritramide based patient-controlled analgesia (PCA) as a standard of care for pain control in late abortion induction: A prospective cohort study from a patien... oleh L. Tascón Padrón, N.L.A. Emrich, B. Strizek, A. Gass, C. Link, T. Hilbert, S. Klaschik, W. Meissner, U. Gembruch, J. Jiménez Cruz