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Ahmad MU, Sharif KA, Qayyum H, Ehsanullah B, Balyasnikova S, Wale A, Shanmuganandan A, Siddiqui MRS, Athanasiou T, Kemp GJ.Ahmad MU, et al. Among authors: siddiqui mrs.Postgrad Med J. 2017 Nov;93(1105):671-678. doi: 10.1136/postgradmedj-2017-134945. Epub 2017 Jul 6.Postgrad Med J. 2017.PMID: 28684530Free article.Review.