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Sampson HA, Bernhisel-Broadbent J, Yang E, Scanlon SM.Sampson HA, et al.J Pediatr. 1991 Apr;118(4 Pt 1):520-5. doi: 10.1016/s0022-3476(05)90001-2.J Pediatr. 1991.PMID: 2007924Clinical Trial.