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White PD, Thomas JM, Kangro HO, Bruce-Jones WD, Amess J, Crawford DH, Grover SA, Clare AW.White PD, et al. Among authors: kangro ho.Lancet. 2001 Dec 8;358(9297):1946-54. doi: 10.1016/S0140-6736(01)06961-6.Lancet. 2001.PMID: 11747919
Kangro HO, Osman HK, Lau YL, Heath RB, Yeung CY, Ng MH.Kangro HO, et al.J Med Virol. 1994 May;43(1):91-6. doi: 10.1002/jmv.1890430117.J Med Virol. 1994.PMID: 8083655