YUE Ding-Yuan. Value of the P/PR segment ratio in the evaluation of the left cardiac function of children with rheumatic heart disease[J]. 中国当代儿科杂志, 2006, 8(2): 162-163.
YUE Ding-Yuan. Value of the P/PR segment ratio in the evaluation of the left cardiac function of children with rheumatic heart disease[J]. CJCP, 2006, 8(2): 162-163.