Norman GR, Wyrwich KW, Patrick DL. The mathematical relationship among different forms of responsiveness coefficients. Qual Life Res. 2007 Jun;16(5):815-22. Epub 2007 Mar 10.
Norman GR, Wyrwich KW, Patrick DL. The mathematical relationship among different forms of responsiveness coefficients. Qual Life Res. 2007 Jun;16(5):815-22. Epub 2007 Mar 10.