Long-term survival of patients with pulmonary arterial hypertension associated with connective tissue disease : beneficial effects of beraprost sodium , an oral prostacyclin analog

Received 8 December 2016, accepted 26 December 2016 Correspondence to: Sumiaki Tanaka, Department of Rheumatology and Infectious Diseases, Kitasato University School of Medicine 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374, Japan E-mail: sumi@med.kitasato-u.ac.jp Long-term survival of patients with pulmonary arterial hypertension associated with connective tissue disease: beneficial effects of beraprost sodium, an oral prostacyclin analog