Sympathetic reactivity to physiological stress is associated with expanded cardiac extracellular volume in humans. - Blythe, Hazel C.; Adams, Zoe H.; Hope, Katrina A.; Baker, Richard P.; Hezzell, Melanie J.; Suleiman, M. Saadeh; Sheikh, Ana Paula Abdala; Manghat, Nathan; Mitrousi, Konstantina; Nightingale, Angus K.; Hart, Emma C. (BMC Medicine, 2025)