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Hardwick JB, Tucker AT, Wilks M, Johnston A, Benjamin N.Hardwick JB, et al. Among authors: johnston a.Clin Sci (Lond). 2001 Apr;100(4):395-400.Clin Sci (Lond). 2001.PMID: 11256977
Al Ameri MN, Mohamed W, Makramalla E, Shalhoub B, Tucker A, Johnston A.Al Ameri MN, et al. Among authors: johnston a.East Mediterr Health J. 2013 Apr;19(4):373-81.East Mediterr Health J. 2013.PMID: 23882964Free article.