Introduction
© Springer International Publishing Switzerland 2016Alwin Krämer and Harald Löffler (eds.)Cancer of Unknown Primary10.1007/978-3-319-22581-4_1 1. Introduction Harald Löffler1 and Alwin Krämer1 (1) Clinical Cooperation Unit Molecular Hematology/Oncology, German Cancer Research Center (DKFZ) and University of Heidelberg, Heidelberg,…