Metabolic insights at the finish line: deciphering physiological changes in ultramarathon runners through breath VOC analysis. - Chou H; Arthur K; Shaw E; Schaber C; Boyle B; Allsworth M; Kelley EF; Stewart GM; Wheatley CM; Schwartz J; Fermoyle CC; Ziegler BL; et al. (Journal of breath research, 2024)