PT - JOURNAL ARTICLE AU - Callejo, María AU - Blanco, Isabel AU - Barberá, Joan Albert AU - Perez-Vizcaino, Francisco TI - Vitamin D deficiency, a potential cause for insufficient response to sildenafil in pulmonary arterial hypertension AID - 10.1183/13993003.01204-2021 DP -2021 NOV 01 TA-欧洲呼吸杂志PG -2101204 VI -58 IP -5 4099 -http：//www.qdcxjkg.com/content/58/5/5/5/5/2101204.short 4100 -http：// erj。erersjournals.com/content/58/5/5/2101204.full so -eur Respir J2021 11月1日；58