Response to letter "Clinical characteristics and survival of pulmonary arterial hypertension associated with three major connective tissue diseases: Methodological issues"
Int J Cardiol. 2017 Dec 15:249:418.
doi: 10.1016/j.ijcard.2017.06.126.
1 Department of Rheumatology, Peking Union Medical College Hospital, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Peking Union Medical College & Chinese Academy of Medical Sciences, No. 1 Shuaifuyuan, Beijing 100730, China.
2 Department of Epidemiology and Bio-statistics, Institute of Basic Medical Sciences, Peking Union Medical College/China Academy of Medical Sciences, Beijing, China. Electronic address: wyhong826@pumc.edu.cn.