Bias and precision of methods for estimating the difference in restricted mean survival time from an individual patient data meta-analysis. Lueza, B.; Rotolo, F.; Bonastre, J.; Pignon, J. P.; Michiels, S.. BMC Med Res Methodol. 2016; 37: p.37. doi:10.1186/s12874-016-0137-z 10.1186/s12874-016-0137-z.Article