Arnauld E. Nicogossian, MD, FACPM, FACP Distinguished Research Professor Schar School of Policy and Government, George Mason University Senior Editor, World Medical and Health Policy Journal, and Former NASA Associate Administrator, Office of Life and Microgravity Sciences and Applications Arlington, VA, USA Richard S. Williams, MD, FACS Chief Health and Medical Officer National Aeronautics and Space Administration Washington, DC, USA Carolyn L. Huntoon, PhD Former Director NASA Lyndon B. Johnson Space Center & Assistant Secretary of Environmental Management, DOE Barrington, Rhode Island, USA Charles R. Doarn, MBA Special Assistant to the Chief Health and Medical Officer NASA Office of the Chief Health and Medical Officer Washington, DC, USA Research Professor Department of Family and Community Medicine School of Medicine Unviersity of Cincinnati Cincinnati, Ohio, USA James D. Polk, DO, MS, MMM, CPE, FACOEP Senior Medical Officer National Aeronautics and Space Administration Former Chief Flight Medicine NASA Lyndon B. Johnson Space Center Houston, Texas, USA Victor S. Schneider, MD Program Executive Human Exploration & Operations Mission Directorate NASA HQ Visiting Associate Professor University of Texas Medical Branch, Galveston, Texas, USA