Assertion: zinc | /r/HasProperty | given for four months
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Source sentences:
text: Two other trials found that supplemental zinc failed to improve MDI or PDI at 12 months of age when zinc (10 mg/day) was given to six-month-old infants for six months (59) or at the end of the intervention in toddlers aged 12-18 months when zinc (30 mg/day) was given for four months (60).