المؤلفون: Benkel, D H, McClure, E M, Woolard, D, Rullan, J V, Miller, G B, Jenkins, S R, Hershey, J H, Benson, R F, Pruckler, J M, Brown, E W, Kolczak, M S, Hackler, R L, Rouse, B S, Breiman, R F

المصدر: International Journal of Epidemiology; December 2000, Vol. 29 Issue: 6 p1092-1098, 7p