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Hedger SC, Macardle P, Bond MJ, Ahern MJ, Smith MD, Roberts-Thomson PJ.Hedger SC, et al.Aust N Z J Med. 1999 Apr;29(2):234-8. doi: 10.1111/j.1445-5994.1999.tb00689.x.Aust N Z J Med. 1999.PMID: 10342023
Xu HJ, Roberts-Thomson PJ, Ahern MJ, Zola H.Xu HJ, et al.Ann N Y Acad Sci. 1992 May 4;651:594-8. doi: 10.1111/j.1749-6632.1992.tb24673.x.Ann N Y Acad Sci. 1992.PMID: 1376088