Evaluation of the effectiveness of a digital-intelligent-system-based implementation strategy in improving the quality of prehospital medical care: rationale and design of a stepped-wedge cluster randomized controlled trial. - Wang, Lang; Hu, Yali; Hou, Bowen; Cui, Ying; Zhang, Huang; Zhao, Yilin; Wang, Zhuo; Feng, Hui; Wang, Songyun; Zhu, Lihua; Yu, Lilei; Jiang, Hong (BMC Health Services Research, 2025)