Negative studies
- PMID: 2761580
- DOI: 10.1056/NEJM198908173210708
Negative studies
Comment in
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Confusion about "negative" studies.N Engl J Med. 1990 Apr 12;322(15):1084-5. doi: 10.1056/NEJM199004123221514. N Engl J Med. 1990. PMID: 2320072 No abstract available.
Comment on
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The absence of a relation between the periconceptional use of vitamins and neural-tube defects. National Institute of Child Health and Human Development Neural Tube Defects Study Group.N Engl J Med. 1989 Aug 17;321(7):430-5. doi: 10.1056/NEJM198908173210704. N Engl J Med. 1989. PMID: 2761577
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