Evaluating patients' perception of service quality at hospitals in nine Chinese cities by use of the ServQual scale oleh Min Li, Douglas Bruce Lowrie, Cheng-Yu Huang, Xiang-Chan Lu, Ying-Chu Zhu, Xing-Hua Wu, Mayila Shayiti, Qiong-Zhen Tan, Hua-Ling Yang, Si-Yuan Chen, Pan Zhao, Sheng-Hua He, Xiu-Rong Wang, Hong-Zhou Lu