Individuals seen in the nephrology clinic at the University of Michigan will be eligible to enroll in this study. Their clinical data will be recorded, blood and urine samples will be collected and if a biopsy is performed as a part of their standard medical care then a small sample will be reserved for use in the study after all pathological evaluations required for patient care are completed. Biological samples will be available for biochemical, molecular biological and genetic testing and for correlation of these parameters to the individuals clinical data in future studies.