Capt. Joel Roos, left, Naval Medical Center San Diego (NMCSD) commanding officer, visits the Naval Health Research Center to learn more about research being conducting research to improve the readiness and health of service members. Dr. Rachel Markwald, right, discusses current operational and clinical research studies, including collaborative efforts with NMCSD. Markwald and her team are researching methods to mitigate the effects of sleep loss and fatigue on warfighter performance and health. ( Navy photo by Regena Kowitz/Released)

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