2REED L J, MUENCH H. A simple method of estimating fifty percent end points [ J ]. Am J Hyg, 1983,27:493 - 497. 被引量:1
3IGIETSEME J U,EKO F O,BLACK C M. Contemporary approaches to designing and evaluating vaccines against Chlamydia [ J ]. Vaccines ,2003,2( 1 ) : 123 - 146. 被引量:1