title: Cyanosis in a primum atrial septal defect without pulmonary hypertension.
authors: Department of Echocardiography, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China.
authors: Lili
authors: L
authors: Dong
authors: Cuizhen
authors: C
authors: Pan
authors: Xianhong
authors: X
authors: Shu