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Bjarnason I, Zanelli G, Smith T, Prouse P, Williams P, Smethurst P, Delacey G, Gumpel MJ, Levi AJ.Bjarnason I, et al.Gastroenterology. 1987 Sep;93(3):480-9. doi: 10.1016/0016-5085(87)90909-7.Gastroenterology. 1987.PMID: 3609658
Bjarnason I, Marsh MN, Price A, Levi AJ, Peters TJ.Bjarnason I, et al.Gut. 1985 Nov;26(11):1214-9. doi: 10.1136/gut.26.11.1214.Gut. 1985.PMID: 3934051Free PMC article.
Bjarnason I, Smethurst P, Levi AJ, Menzies IS, Peters TJ.Bjarnason I, et al.Scand J Gastroenterol. 1991 Jul;26(7):685-8. doi: 10.3109/00365529108998584.Scand J Gastroenterol. 1991.PMID: 1896808
Bjarnason I, Smethurst P, Clark P, Menzies I, Levi J, Peters T.Bjarnason I, et al.Scand J Gastroenterol Suppl. 1989;164:97-102; discussion 102-3. doi: 10.3109/00365528909091195.Scand J Gastroenterol Suppl. 1989.PMID: 2510288Clinical Trial.