1. Division of Clinical Epidemiology and Aging Research; German Cancer Research Centre; Heidelberg Germany
2. Division of Hematology; Department of Medicine; Thomas Jefferson University; Philadelphia PA USA
3. Cancer Registry of Rhineland-Palatinate Institute for Medical Biostatistics; Epidemiology and Informatics; University Medical Centre; Johannes Gutenberg University Mainz; Mainz Germany
4. Saarland Cancer Registry; Saarbrücken Germany
5. Cancer Registry of Schleswig-Holstein; Lübeck Germany