1795
METHODS AND RESULTS : The present study is a multicenter , randomized , double - blind comparison of iopamidol and iodixanol in patients with chronic kidney disease ( estimated glomerular filtration rate , 20 to 59 mL / min ) who underwent cardiac angiography or percutaneous coronary interventions .
 iopamidol, iodixanol, chronic kidney disease
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 iopamidol, iodixanol, chronic kidney disease