Waldemar Siemens1, Guido Schwarzer2, Miriam S. Rohe1, Jörg J. Meerpohl3,  Gerhild Becker1

1 Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Clinic for Palliative Care, Freiburg, Baden-Württemberg, Deutschland
2 Faculty of Medicine and Medical Center, University of Freiburg, Institute of Medical Biometry and Statistics, Freiburg, Baden-Württemberg, Deutschland
3 Medical Center-University of Freiburg, Institute for Evidence in Medicine (for Cochrane Germany Foundation), Freiburg, Baden-Württemberg, Deutschland

Heterogeneity of systematic reviews with meta-analyses of pharmacological, surgical and radiotherapeutic interventions in patients with advanced cancer - a meta-epidemiological study (SCOPE)