Thirty-nine-month xylitol chewing-gum programme in initially 8-year-old school children: a feasibility study focusing on mutans streptococci and lactobacilli.
Mäkinen KK, Alanen P, Isokangas P, Isotupa K, Söderling E, Mäkinen PL, Wenhui W, Weijian W, Xiaochi C, Yi W, et al. Int Dent J. 2008 Feb; 58(1):41-50.