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2. Fowler MG, Johnson MP, Atkinson SS. School achievement and absence in children with chronic health conditions. J Pediatr. 1985 Apr;106(4):683-7.
3. Balfanz, R., & Byrnes, V. Chronic Absenteeism: Summarizing What We Know From Nationally Available Data. Baltimore: Johns Hopkins University Center for Social Organization of Schools. 2012