%0 Journal Article %T Comparative effectiveness research: what is it and why do we need it in nephrology? %A Chang, Tara I. %A Winkelmayer, Wolfgang C. %J Nephrology Dialysis Transplantation %V 27 %N 6 %P 2156-2161 %@ 0931-0509 %D 2012-06-01 %I Oxford University Press %~ DeepDyve