المؤلفون: Niu, Shi-Ru, Yang, Gong-Huang, Chen, Zheng-Ming, Wang, Jun-Ling, Wang, Gong-Hao, He, Xing-Zhou, Schoepff, Helen, Boreham, Jillian, Pan, Hong-Chao, Peto, Richard

المصدر: BMJ: British Medical Journal, 1998 Nov . 317(7170), 1423-1424.

URL الوصول: https://www.jstor.org/stable/25181053