QU-BraTS: MICCAI BraTS 2020 Challenge on Quantifying Uncertainty in Brain Tumor Segmentation -- Analysis of Ranking Metrics and Benchmarking Results Raghav Mehta,Angelos Filos,Ujjwal Baid,Chiharu Sako,Richard McKinley,Michael Rebsamen,Katrin Dätwyler,Raphael Meier,Piotr Radojewski,Gowtham Krishnan Mur...