*Comparison of 1.78 M erythritol treatment and control was borderline significant (log-rank test, p = 0.055). 4. Discussion 4. DIinsctuhsissisotnudy, we tested the effect of two polyols, glycerol and propylene glycol (PG), on three dipterIannthspisecstieusdyth, awt eartesmteadjotrheager...