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Mikhail JR, Mitchell DN.Mikhail JR, et al.Postgrad Med J. 1971 Nov;47(553):698-704. doi: 10.1136/pgmj.47.553.698.Postgrad Med J. 1971.PMID: 4110536Free PMC article.
Mikhail JR, Mitchell DN.Mikhail JR, et al.Postgrad Med J. 1970 Aug;46(538):484-5. doi: 10.1136/pgmj.46.538.484.Postgrad Med J. 1970.PMID: 5481096Free PMC article.
Mikhail JR, Drury RA.Mikhail JR, et al.Postgrad Med J. 1970 Aug;46(538):515-8. doi: 10.1136/pgmj.46.538.515.Postgrad Med J. 1970.PMID: 5481104Free PMC article.