doi> STRUCHINER, C. J.; HALLORAN, M. E. . Randomization and baseline transmission in vaccine field trials. Epidemiology and Infection, v. 135, p. 181-194, 2007.
doi> STRUCHINER, C. J.; HALLORAN, M. E. . Randomization and baseline transmission in vaccine field trials. Epidemiology and Infection, v. 135, p. 181-194, 2007.