The NIH and CDC granted researchers at the Feinstein Institutes for Medical Research at Northwell Health $700,000 to investigate an in-the-ear stimulator as a treatment for post-traumatic stress disorder (PTSD) in first responders to the attack on the World Trade Center 20 years ago. The researchers will enroll 30 World Trade Center first responders with chronic PTSD in a sham-controlled trial to test the effectiveness of a device that uses transcutaneous auricular stimulation of the vagus nerve, which has shown promise in preclinical studies.