| Http://: http://en.wikipedia.org/wiki/Xanthinuria |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/4369449 |
| Http://: https://medlineplus.gov/genetics/condition/hereditary-xanthinuria/ |
| Http://: http://en.wikipedia.org/wiki/Xanthinuria |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/4369449 |
| Http://: https://medlineplus.gov/genetics/condition/hereditary-xanthinuria/ |