Daily hot-water immersion preserves altitude-induced haemoglobin mass expansion following descent independent of erythropoietin. - Jenkins EJ; Koep JL; Douglas AJM; Maier LE; Howe CA; Sheitelman S; Corr LD; Siebenmann C; Hughes MG; Tremblay JC; Ainslie PN; Gibbons TD; et al. (Experimental physiology, 2026)