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机构:
Univ Hosp, Dept Palliat Med, Ctr Integrated Oncol Cologne Bonn, Clin Trials Ctr Cologne BMBF 01KN0706, D-50924 Cologne, Germany
Univ Hosp, Dept Otorhinolaryngol Head & Neck Surg, D-50924 Cologne, Germany Univ Hosp, Dept Palliat Med, Ctr Integrated Oncol Cologne Bonn, Clin Trials Ctr Cologne BMBF 01KN0706, D-50924 Cologne, Germany