A biobank is a collection of samples from patients which can be used by researchers in the future to understand more about nephrotic syndrome. The samples provide tremendous opportunities for research into the cause of nephrotic syndrome and how best to treat it. In order to achieve this goal, blood, urine and saliva will be collected with your permission. An important goal to collect samples during both relapse and remission from the same person. Therefore, we may ask for a sample when your child is having proteinuria and when your child is well.