| Http://: https://www.ncbi.nlm.nih.gov/pubmed/11941538 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/1552548 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/18647752 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/11941538 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/1552548 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/18647752 |