%0 Journal Article %T Methods for assessing reliability and validity for a measurement tool: a case study and critique using the WHO haemoglobin colour scale %A White, Sarah A. %A van den Broek, Nynke R. %J Statistics in Medicine %V 23 %N 10 %P 1603-1619 %@ 0277-6715 %D 2004-05-30 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve