Characterisation of between-cluster heterogeneity in malaria cluster randomised trials to inform future sample size calculations.

Biggs J, Challenger JD, Dee D, Elobolobo E, Chaccour C, Saute F, Staedke SG, Vilakati S, Chung JB, Hsiang MS, Dabira ED, Erhart A, D'Alessandro U, Tripura R, Peto TJ, Von Seidlein L, Mukaka M, Mosha J, Protopopoff N, Accrombessi M, Hayes R, Churcher TS, Cook J