Szilagyi PG, Schaffer S, Rand CM, Goldstein NPN, Hightower AD, Younge M, Eagan A, Blumkin A, Albertin CS, DiBitetto K, Concannon C, Vincelli P, Yoo BK, Humiston SG. Impact of elementary school-located influenza vaccinations: A stepped wedge trial across a community. Vaccine. 2018 05 11; 36(20):2861-2869.