RT期刊文章SR电子T1维生素D的违抗ciency, a potential cause for insufficient response to sildenafil in pulmonary arterial hypertension JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2101204 DO 10.1183/13993003.01204-2021 A1 Callejo, María A1 Blanco, Isabel A1 Barberá, Joan Albert A1 Perez-Vizcaino, Francisco YR 2021 UL //www.qdcxjkg.com/content/early/2021/07/29/13993003.01204-2021.abstract AB