李雪玲，王璐瑶，左正才，等.枸橼酸西地那非治疗结缔组织病相关性肺动脉高压的疗效观察.中华全科医学，2023，21:1834-1836+1915.DOI:10.16766/j.cnki.issn.1674-4152.003236.
参考文献:Jannini EA，Isidori AM，Gravina GL，et al. The ENDOTRIAL Study: A spontaneous，open-Label，randomized，multicenter，crossover study on the efficacy of Sildenafil，Tadalafil，and Vardenafil in the treatment of erectile dysfunction. Journal of Sexual Medicine，2009，6 : 2547-2560.
