1 Department of Pharmaceutical Chemistry, University of California-San Francisco, San Francisco, CA, USA.
2 Science for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden.
3 NCI RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc, Frederick, MD, USA.
4 Department of Pharmaceutical Chemistry, University of California-San Francisco, San Francisco, CA, USA. [email protected].