1Pediatric Nephrology Department, Robert-Debré Hospital, APHP, Paris, France

2Pharmacy Department, Robert-Debré Hospital, APHP, Paris, France

3Université Paris Cité, INSERM, UMR-S970, PARCC, Paris Translational Research Center for Organ Transplantation, Paris, France

Correspondence: Prof. Julien Hogan, Department of Pediatric Nephrology, Dialysis and Transplantation, Robert-Debré Hospital, APHP, 48 bd Sérurier, 75019 Paris, France. Email: [email protected]

See related editorial, “Treating Frequently Relapsing and Steroid-Dependent Nephrotic Syndrome: To Obi or Not to Obi, That is the Question,” on pages 1527–1529.