Date last updated: October 2012
What are cookies and what are they used for?
Cookies are small text files that are stored by your web browser. They are primarily used to remember if you have visited a website before and to improve the way that sites work. For example, cookies can be used to:
- remember information such as passwords so that you don't need to keep re-entering it;
- personalise content by recording search and display choices such as layouts;
- provide social network facilities;
- record usage information to help us understand our users and ensure we are providing the right support.
There are different types of cookies, for example:
First party and third party cookies
First party cookies are set by the website you're visiting. They send data only to the servers for that domain, and the data cannot be altered or retrieved by any other website. If a user visits a website and a separate company sets a cookie through that website, this is a third party cookie. Examples of third party cookies are those set by social networks.
Session and persistent cookies
Cookies can expire at the end of a browser session or they can be stored for longer. Session cookies are not stored long-term; they are set when you visit a website, and expire as soon as the browser is closed.
Persistent cookies are stored on your device in between browser sessions and allow preferences to be remembered. They are used for a variety of reasons, including recording your preferred search results display.
Managing and deleting cookies
- To provide the login to Europe PMC plus;
- For functionality;
- To record general usage information.
Details about Europe PMC plus cookie use are given in the table below. You can selectively turn off some cookies, eg. Google analytics.
Note: if you stop Europe PMC plus using cookies completely then the service will no longer work for you.
Cookies that are strictly necessary
|NcbiLsSession_DUKMSS_loginlock||Generated number||When login process complete||Session tracking.|
|NcbiLsSession_DUKMSS||Generated number||At end of session (when you exit browser)||Session tracking.|
|NIHMS_SUPER_SESSION||Generated code||At end of session (when you exit browser)||Session tracking.|
Cookies for Functionality
|NIHMS_LANG||Language code||At end of session (when you exit browser)||Language setting.|
Cookies for Measuring Website Usage (Google Analytics)
We use Google Analytics to analyse how our visitors use this website, in order to improve your experience on the site. Google Analytics uses only first-party cookies, which are available only to Europe PMC plus, and don't reveal any personally identifiable information.
|__utma||Randomly generated number||2 years|
|__utmb||Randomly generated number||30 minutes|
|__utmc||Randomly generated number||When you close your browser|
|__utmz||Randomly generated number and information on how the site was reached (e.g. direct or via a link, organic search or paid search)||6 months|
The following is taken from the Google analytics Terms of Service:
If you wish, you can opt out of being tracked by Google Analytics across all websites, see: http://tools.google.com/dlpage/gaoptout.