Effect of herbal yeast food supplement and long-distance running on immunological parameters. - Gmunder,F.K.; Joller,P.W.; Joller-Jemelka,H.I.; Bechler,B.; Cogoli,M.; Ziegler,W.H.; Muller,J.; Aeppli,R.E.; Cogoli,A. (Br J Sports Med, 1990)