Department of Internal Medicine;
Hospital de Especialidades;
Centro Médico Nacional la Raza;
IMSS;
Universidad Nacional Autónoma de México;
02990 Mexico City;
México;
Division of Hospital Medicine;
Department of Internal Medicine;
Texas Tech University Health Sciences Center/Paul L.Foster School of Medicine;
El Paso;
TX 79905;
United States;
Pulmonary; arterial; hypertension; Systemic; sclerosis; Diagnosis; Therapy; Prognosis;