The Effects of B-Sitosterol (BSS) and B-Sitosterol Glucoside (BSSG) Mixture on Selected Immune Parameters of Marathon Runners: Inhibition of Post Marathon Immune Suppression and Inflammation - Bouic, P J D; Clark, A; Lamprecht, J; Freestone, M; Pool, E J; Liebenberg, R W; Kotze, D; van Jaarsveld, P P (International Journal of Sports Medicine, 1999)