Ahmad, Y (2018-03-24). "Patent foramen ovale closure vs. medical therapy for cryptogenic stroke: a meta-analysis of randomized controlled trials". European Heart Journal. 39 (18): 1638—1649. doi:10.1093/eurheartj/ehy121. PMID29590333.
Ahmad, Y (2018-03-24). "Patent foramen ovale closure vs. medical therapy for cryptogenic stroke: a meta-analysis of randomized controlled trials". European Heart Journal. 39 (18): 1638—1649. doi:10.1093/eurheartj/ehy121. PMID29590333.