Author's Acknowledgment

Thanks with my warm to those who have made great contributions to our association which is the base of this history.

Special thanks should go to President Qingyi Wei, PH78, for his encouragement, support, and acknowledgment, to former Steering Committee Coordinators Youcheng Liu, PH78, and Yongjian Liu, MD78, for their efforts in providing me with valuable information, and to Alumni Youcheng Liu, PH78, Qingyi Wei, PH78, and Liangfeng Tao PH79, for spending their precious time reviewing and correcting the first draft.

Ning Jin, NS84, Ann Arbor, USA, Sept. 1, 1996