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Effectiveness of sildenafil in pulmonary hypertension secon..:

Tinni Mitra ; Kallol Das Baksi ; Plaban Mukherjee..
http://www.amhsjournal.org/article.asp?issn=2321-4848;year=2020;volume=8;issue=2;spage=225;epage=229;aulast=Mitra.  , 2020