1. Institute of Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, Prague, Czech Republic
2. Pediatric Rheumatology, Children’s Hospital at Montefiore, Bronx, NY, USA
3. Pediatric Rheumatology, Nicklaus Children’s Hospital, Miami, FL, USA
4. Institute of Rheumatology, Prague, Czech Republic
5. Section on Nephrology, Wake Forest School of Medicine, Winston-Salem, NC
6. Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic