%0 Journal Article %T Nonparametric Group Sequential Methods for Evaluating Survival Benefit from Multiple Short-Term Follow-up Windows %A Xia, Meng %A Murray, Susan %A Tayob, Nabihah %J Biometrics %V 75 %N 2 %P 494-505 %@ 0006-341X %D 2018-11-20 %I Oxford University Press %~ DeepDyve