GHOSH, Abhishek; DAS, Asoke Kumar; BISWAS, Rajat Kanti; GHOSH, Balaram; PAL, Ananya; GHOSH, Souvik. Is there any difference in efficacy of oral sildenafil therapy in primary vs secondary Pulmonary Arterial Hypertension?. Journal of Drug Delivery and Therapeutics, India, v. 3, n. 1, 2013. DOI: 10.22270/jddt.v3i1.375. Disponível em: https://jddtonline.info/index.php/jddt/article/view/375. Acesso em: 22 jan. 2026.