Improved low-risk criteria scores for combination therapy of sildenafil and generic bosentan in patients with congenital heart disease with severe pulmonary hypertension: A prospective open label study. - Durongpisitkul, Kritvikrom; Chungsomprasong, Paweena; Vijarnsorn, Chodchanok; Chanthong, Prakul; Kanjanauthai, Supaluck; Soongswang, Jarupim (JRSM Cardiovascular Disease, 2021)