Becca Whittle tells PEOPLE she was having dinner with her family when she noticed that her daughter, Harper, wasn’t feeling well and was showing flu-like symptoms.

Nephrotic syndrome (NS) is the most frequent cause ... NS according to the different groups and considering all the clinical phenotypes. Almost 50 NPHS2 mutations have been reported and variants ...

The study group consisted of 60 children who had been diagnosed as sporadic nephrotic syndrome in Children's Hospital of Medical College, Zhejiang University from 2001 to 2004. Clinical data ...