The NCBI website at www.ncbi.nlm.nih.gov has temporarily blocked access due to a possible misuse or abuse situation involving the site. This is not due to a security issue like a virus or attack, but rather could be something as simple as a run away script or not using E-utilities efficiently. The website suggests contacting the system administrator to restore access and learn how to better interact with the site to avoid similar situations in the future. Contact email for the website is info@ncbi.nlm.nih.gov.