On their website under Admission > General applicant information it says:
Financial Aid
Funds are available for the full support of graduate training for Ph.D. students. Students are supported with annual stipends of $32,250, as well as full tuition remission and health insurance. Stipend support is made possible by funds from federally funded research grants and fellowships, the NIGMS Training Grant in Biomolecular Pharmacology, and support from the pharmaceutical industry. Financial aid is also available for students who are members of minority groups through NIH grant supplements.