The Feinstein Institutes for Medical Research comprise the research arm of Northwell Health. Feinstein is home to 50 research labs, 2,500 clinical research studies, and 4,000 professional and support staff. Feinstein researchers have made breakthroughs in molecular medicine, genetics, cancer, brain research, mental health, autoimmunity and bioelectronic medicine, among others, and continue work in those and other areas. Feinstein is the laboratory and faculty home of the Elmezzi Graduate School of Molecular Medicine. Additionally, students without an MD degree may earn a PhD in molecular medicine via the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, as part of the medical school's MD/PhD or PhD programs.