Evaluation of the Risk of Nephrogenic Systemic Fibrosis (NSF) in Patients With Chronic Kidney Disease Without Exposure to Gadolinium Based Contrast Agents (GBCA)

Inclusion Criteria: * Has CKD with an eGFR below 30 mL/min/1.73m2 and/or undergoing dialysis as calculated from a serum creatinine (SCr) value obtained from the local laboratory within 24 hours prior to signing the informed consent; * Provides written informed consent and is willing to comply with protocol requirements Exclusion Criteria: * Has received a GBCA within the past 10 years prior to inclusion in this study including the administration of a GBCA for something other than an MRI (e.g., CT or DSA); * Has any medical condition or other circumstances which would significantly decrease the chances of obtaining reliable data and achieving study objectives; * Has ever been suspected of, or diagnosed with, NSF; * Is unable or unwilling to return for necessary office visits, to be examined by dermatologists or to undergo deep skin biopsy and laboratory/other diagnostic evaluations should development of NSF be suspected.