TY - RPRT TI - Randomization-based nonparametric methods for the analysis of multicentre trials. AU - Lisa M LaVange AU - Todd A Durham AU - Gary G Koch PY - 2005 DO - 10.1191/0962280205sm397oa UR - https://pubmed.ncbi.nlm.nih.gov/15969304/ ID - 15969304 ER -