[1] Univ Hosp Zurich, Zurich, Switzerland
[2] Heidelberg Univ, Heidelberg, Germany
[3] German Canc Res Ctr, German Consortium Transnat Canc Res DKTK, Clin Cooperat Unit Neuropathol, Heidelberg, Germany
[4] Hopp Childrens Canc Ctr, Heidelberg, Germany
[5] Adastra Pharmaceut, San Diego, CA USA