Department of Hematology and Medical Oncology, Paracelsus Medical University, Nuremberg, Germany. Electronic address: Martin.Wilhelm@klinikum-nuernberg.de. Outpatient Clinic, Leer, Germany. Saladax Biomedical Inc., Bethlehem, PA. Outpatient Clinic, Lueneburg, Germany. Institute for Clinical Chemistry and Pharmacology, University of Bonn, Bonn, Germany. Central Laboratory, Paracelsus Medical University, Nuremberg, Germany. University Clinic of Wuerzburg, Wuerzburg, Germany. Hemato-Oncologic Clinic, Munich, Germany. Oncological Center, Munich, Germany. Clinic Barmherzige Brueder, Regensburg, Germany. Department of Hematology and Medical Oncology, Paracelsus Medical University, Nuremberg, Germany. CESAR Central European Society for Anticancer Drug Research-EWIV, Vienna, Austria. Pharmaceutical Institute, University Bonn, Bonn, Germany.