; set data in the survey was used to verify the condition for the respondents; specifically, those with the highest and lowest socioeconomic status (SES). The participants were 23 adult chronic kidney disease patients on hemodialysis who were recruited from a Nephrology outpatient clinic at a large Midwestern hospital. The study was approved by the University of Michigan Institutional Review Board (IRB# 20101. The participants signed an IRB form that gave consent for this study and a second study on chronic kidney disease. Consent was given voluntarily. There are no financial ties between any of the researchers and the pharmaceutical industry.}, based on the context: The study was approved by the University of Michigan Institutional Review Board (IRB# 20102. The participants signed an IRB form that gave consent for this study and a second study on chronic kidney disease. Consent was given voluntarily. There are no financial ties between any of the researchers and the pharmaceutical industry.