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Damage to the kidneys , known as diabetic nephropathy , can lead to tissue scarring , urine protein loss , and eventually chronic kidney disease , sometimes requiring dialysis or kidney transplantation .
 diabetic nephropathy, tissue scarring, urine protein loss, chronic kidney disease
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 diabetic nephropathy, tissue scarring, urine protein loss, chronic kidney disease