{"id":"W2062075871","doi":"10.1161/01.cir.0000099502.17776.c2","title":"Long-Term Treatment With Oral Sildenafil Is Safe and Improves Functional Capacity and Hemodynamics in Patients With Pulmonary Arterial Hypertension","year":2003,"lang":"en","type":"article","venue":"Circulation","topic":"Pulmonary Hypertension Research and Treatments","field":"Medicine","cited_by":381,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"","keywords":"Sildenafil; Medicine; Pulmonary hypertension; Vascular resistance; Internal medicine; Cardiology; Hemodynamics; cGMP-specific phosphodiesterase type 5; Tadalafil; Cardiac index; Vasodilation; Pulmonary artery; Anesthesia; Cardiac output","routes":{"ca_aff":false,"ca_fund":false,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":true},"retraction":null,"screen":null,"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02195370277172175,"score_gpt":0.2261540950802216,"score_spread":0.2042003923084998,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}