Exploring effects of self‐management on glycemic control using a modified information–motivation–behavioral skills model in type 2 diabetes mellitus patients in Shanghai, China: A cross‐sectional study: 中国上海市2型糖尿病患者利用改进的信息‐动机‐行为技巧模型对血糖控制的自我管理的作用机制探索:一项横断面研究. Issue 9 (23rd March 2018)