Birk-Urovitz, Elizabeth, Ye Li, Steven Drews, Christopher Sikora, Deena Hinshaw, Rita K. Biel, Faiza Habib, et al. 2017. “Correlation of School Absenteeism and Laboratory Results for Flu A in Alberta, Canada”. Online Journal of Public Health Informatics 9 (1). https://doi.org/10.5210/ojphi.v9i1.7679.