| Literature DB >> 9343509 |
J MacKenzie, J Sheldon, G Morgan, G Cook, T F Schulz, R F Jarrett.
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Year: 1997 PMID: 9343509 DOI: 10.1016/s0140-6736(05)63792-0
Source DB: PubMed Journal: Lancet ISSN: 0140-6736 Impact factor: 79.321