Chen C J, Hwang S J, Fan K Y, Chang S A, Chang Y H, Wang S R, Liu W T, Liaw Y F, Chai C Y, Chang R
Institutes of Public Health, National Taiwan University College of Medicine, Taipei, Taiwan, Republic of China.
J Infect Dis. 1988 Sep;158(3):633-5. doi: 10.1093/infdis/158.3.633.