Between Sept @ and Dec @ , @ , @ participants were randomly assigned ( @ assigned to control -LSB- @ analysed -RSB- , @ assigned to @CMenB -LSB- @ analysed -RSB- , @ assigned to MenACWY-CRM -LSB- @ analysed -RSB- ) ; @ % of the @CMenB group , @ % of the MenACWY-CRM group , and @ % of the control group were positive for meningococcal carriage at study entry .