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Keszler M, Modanlou HD, Brudno DS, Clark FI, Cohen RS, Ryan RM, Kaneta MK, Davis JM.Keszler M, et al. Among authors: ryan rm.Pediatrics. 1997 Oct;100(4):593-9. doi: 10.1542/peds.100.4.593.Pediatrics. 1997.PMID: 9310511Clinical Trial.