| Http://: https://www.ncbi.nlm.nih.gov/pubmed/9160670 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/2014236 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/16463284 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/9160670 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/2014236 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/16463284 |