G. Blessmann

Immunostimulation by bacterial components: II. Efficacy studies and meta-analysis of the bacterial extract OM-89.

W. Bessler, H. Bauer, G. Winkelmann, 2000, International journal of immunopharmacology.

Prevention of recurrent urinary tract infections with immuno-active E. coli fractions: a meta-analysis of five placebo-controlled double-blind studies.

H. Bauer, V. Rahlfs, P. Lauener, 2002, International journal of antimicrobial agents.