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Cousens SN, Linsell L, Smith PG, Chandrakumar M, Wilesmith JW, Knight RS, Zeidler M, Stewart G, Will RG.Cousens SN, et al. Among authors: knight rs.Lancet. 1999 Jan 2;353(9146):18-21. doi: 10.1016/s0140-6736(98)08062-3.Lancet. 1999.PMID: 10023945
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