تست Oxalate/Cr ratio

0-6 months: 56-175 mg/g
6-12 months: 48-139 mg/g 
1-2 years: 40-103 mg/g
2-3 years: 32-80 mg/g
3-5 years: 24-64 mg/g
5-7 years: 24-56 mg/g
>=7 years: 16 - 48 mg/g