Източници

https://www.ncbi.nlm.nih.gov/pubmed/26511950

https://www.ncbi.nlm.nih.gov/pubmed/26400556

https://www.ncbi.nlm.nih.gov/pubmed/28516306

https://www.ncbi.nlm.nih.gov/pubmed/25701703

https://www.ncbi.nlm.nih.gov/pubmed/25862894

www.oncoweb.org