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Schall JI, Zemel BS, Kawchak DA, Ohene-Frempong K, Stallings VA.Schall JI, et al. Among authors: stallings va.J Pediatr. 2004 Jul;145(1):99-106. doi: 10.1016/j.jpeds.2004.03.051.J Pediatr. 2004.PMID: 15238915