[Risk factors of melamine-contaminated milk powder related urolithiasis: a multicenter nested case-control study].


OBJECTIVE To further confirm and clarify the risk factors of melamine associated urolithiasis. METHODS Case control research was performed in 6 centers from 5 provinces/cities in China. Children less than 36 months old were screened for urolithiasis and recruited in the study. The children with urolithiasis were included as cases and those without… (More)


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