General information of the experts
26 specialists in clinical medicine and nursing, and nursing education from 5 provinces and cities including Shaanxi, Beijing, Shanghai, Chongqing and Zhejiang were selected. The age of the experts involved ranged from 36 to 57 years old, with an average of 45.92 (SD 4.98) years old. Their working years ranged from 15 to 33 years, with an average of 21.38 (SD 4.91) years. The details were shown in Table 
Demographic information of experts(N = 26)