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Patent Foramen Ovale Device Closure in Cryptogenic Ischaemic Stroke: A Two Case Reports with Literature Review. J. Natl Inst. Neurosci Bangladesh [Internet]. 2022 May 27 [cited 2026 Jun. 27];8(1):90-9. Available from: https://www.banglajol.info/index.php/JNINB/article/view/59943