1. Centers for Disease Control and Prevention (CDC), 2006a. National Center for Health Statistics (NCHS). National Health and Nutrition Examination Survey Questionnaire. US Department of Health and Human Services, CDC, Hyattsville, MD.
2. Centers for Disease Control and Prevention (CDC). 2006b. Behavioral Risk Factor Surveillance System Survey Questionnaire. US Department of Health and Human Services, CDC, Atlanta, GA (1984–2005).
3. A decade’s story of childhood malnutrition inequality in China: where do you live does matter;Chen;China Economic Review,2007
4. Evaluation of a population-based measure of quality of life: the health and activity limitation index (HALex);Erickson;Quality of Life Research,1998
5. A note on validating Wagstaff and van Doorslaer’s health measure in the analysis of inequalities in health;Gerdtham;Journal of Health Economics,1999