Maj. (Dr.) Joe Restivo, D.O., 99th Medical Support Squadron pathologist, prepares a slide during a fine needle aspiration biopsy at the Mike O’Callaghan Federal Medical Center at Nellis Air Force Base, Nev., on April 15, 2016. A pathologist is a physician who studies body fluids and tissues, helps the primary care doctor make a diagnosis about ones health or any medical problems one have, and uses laboratory tests to monitor the health of patients with chronic conditions. (U.S. Air Force photo by Airman 1st Class Nathan Byrnes)
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