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Story md.com: Chronic Kidney Disease
If your kidneys are damaged and can't filter blood easily, then you may suffer from chronic kidney disease (CKD). Read about the treatments available.
Khan Academy
Khan Academy: Measuring Glomerular Filtration Rate of the Kidneys With Insulin
Read this passage and study the graphics; then take the five-question quiz over measuring glomerular filtration rate of the kidneys with insulin.