Clinical image-based procedures, distributed and collaborative learning, artificial intelligence for combating COVID-19 and secure and privacy-preserving machine learning

10th workshop, CLIP 2021, second workshop, DCL 2021, first workshop, LL-COVID19 2021 and first workshop and tutorial, PPML 2021, held in conjuction with MICCAI 2021, Strasbourg, France, September 27 and October 1, 2021 : proceedings