| Http://: https://www.ncbi.nlm.nih.gov/pubmed/19420365 | 
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/23471908 | 
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/19289823 | 
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/19420365 | 
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/23471908 | 
| Http://: https://www.ncbi.nlm.nih.gov/pubmed/19289823 |