OPTIMUM study protocol: an adaptive randomised controlled trial of a mixed whole-cell/acellular pertussis vaccine schedule.
Gladymar Perez ChaconMarie J EstcourtJames TotterdellDianne E CampbellKirsten P PerrettJulie A MarshPeter C RichmondNicholas WoodMichael S GoldPatrick G HoltClaire S WaddingtonThomas L SnellingPublished in: BMJ open (2020)
ACTRN12617000065392p.