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Maclean D, Murison J, Griffiths PD.Maclean D, et al.Br Med J. 1973 Dec 29;4(5895):757-61. doi: 10.1136/bmj.4.5895.757.Br Med J. 1973.PMID: 4128001Free PMC article.
Maclean D, Taig DR, Emslie-Smith D.Maclean D, et al.Br Med J. 1973 Apr 14;2(5858):87-90. doi: 10.1136/bmj.2.5858.87.Br Med J. 1973.PMID: 4121692Free PMC article.