| Http://: https://www.ncbi.nlm.nih.gov/pubmed/2574903 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/1349231 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/2902106 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/2574903 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/1349231 |
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/2902106 |