Modulation of neutrophil-to-lymphocyte ratio and gut microbiome balance in astronauts: potential benefits of novel beta-glucans during space missions - Ikewaki, Nobunao; Ichiyama, Koji; Senthilkumar, Rajappa; Preethy, Senthilkumar; Abraham, Samuel J. K. (Frontiers in Immunology, 2025)