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摘要： Objective To study the extended clinical trial systems in the United States, the European Union and Australia, and to provide a reference for the improvement of China’s extended clinical trial system. Methods Literature research method, risk management analysis method and comparative research were used in this paper to analyze the development history, scope of use, status quo of the extended clinical trial systems in the United States, the European Union, and Australia. Then, the current situation and shortcomings of China’s extended clinical trial system were compare with these foreign countries so as to put forward some suggestions for improvement. Results and Conclusion China should improve existing laws and regulations by establishing a fast application procedure, increasing application channels, and providing an information disclosure platform to meet the needs of patients in extended clinical trials.
