From the program website: "The UCSF Sandler Fellows Program brings exceptionally promising young scientists to UCSF in a special capacity, in which they establish independent research programs with the sole mandate to do their best science. Fellows are small group leaders with Principal Investigator status in the University, which enables them to obtain extramural grants to support the growth of their programs, and thus are of a special class of "Faculty Fellows" markedly distinct from traditional postdoctoral fellows."
For more information: http://fellows.ucsf.edu/index.php/current-fellows