TY - JOUR A1 - Salomon, J.A. A1 - Tandon, A. A1 - Murray, C.J.L. T1 - Comparability of self rated health: cross sectional multi-country survey using anchoring vignettes Y1 - 2004 DO - 10.1136/bmj.37963.691632.44 JF - British Medical Journal VL - 328 IS - 7434 ER -