What are cookies?
Cookies are small text files which are downloaded to your computer or mobile device when you visit a website or application. Your web browser (such as Internet Explorer, Mozilla Firefox or Google Chrome) then sends these cookies back to the website or application on each subsequent visit so that they can recognise you and remember things like personalised details or user preferences.

Cookies are very useful and do lots of different jobs which help to make your experience on websites as smooth as possible. For example, they let you move between web pages efficiently, remembering your preferences, and generally improving your experience.

They are referred to as session or persistent cookies, depending on how long they are used:

  • Session cookies only last for your online session and disappear from your computer or device when you close your browser.
  • Persistent cookies stay on your computer or device after the browser has been closed and last for the period of time specified in the cookie. These persistent cookies are activated each time you visit the site where the cookie was generated.

Which cookies does Avascular Necrosis AVN UK Support use and why?
When you use one of our services on a web browser or a device, the following 4 categories of cookies may be set:

‘Strictly necessary’ cookies

These cookies are essential in helping you to move around our website and to use their features, such as accessing secure areas of the website. Without these cookies some services may not function. These cookies do not gather information about you that could be used for marketing or remembering where you’ve been on the internet.

Functional cookies

These cookies allow websites and applications to remember choices you make and provide enhanced, more personal features. Whilst these cookies don’t collect things like your name or email address, they do collect a unique user identifier code. This enables us to identify your device so that we can improve your experience and make sure your settings are remembered correctly, for example functional cookies are used to remember your session ID or if you’ve saved favourite content.

Analytics cookies

In order to keep our websites relevant, easy to use and up-to-date, we use analytics cookies to help us understand how people use them. Our websites use Google Analytics a web analytics service provided by Google, Inc. Google Analytics uses cookies to help us analyse how visitors use the site in the aggregate. It does not collect personally identifiable information, and does not track your movements between different websites.

The cookies used by Google Analytics are:

Cookie Name Purpose
Universal Analytics (Google)




These cookies are used to collect information about how visitors use our websites. We use the information to compile reports and help us improve the website. The cookies collect information in an anonymous form, including the number of visitors to the website, where visitors have come to the website from and the pages they visited.

You may opt out of Google Analytics on all websites by installing the Google Analytics Opt-out Browser Add-on, or just for this website.

Find out more about the Google Analytics Opt-out Browser Add-on

We also use Microsoft / Bing Analytics which uses these Cookies:

Identifies unique browsers to Microsoft sites. It is used for advertising, site analytics and other operational purposes.
ANON – Contains the ANID, a unique identifier used to help identify which ads a user may like. It is also used to preserve a user’s choice to opt out of behaviorally targeted ads from Microsoft, if the user has chosen to associate the opt-out with his or her Microsoft account.
CC – Contains a country code as determined by reverse IP address lookup.
Microsoft account authentication – Authentication cookies (e.g., RPSTAuth, MSNRPSAuth, KievRPSAuth) used when a user signs in with a Microsoft account.
NAP – Contains an encrypted version of the user’s country, ZIP code, age, gender, language and occupation, if known, based on the user’s Windows Live profile.
MH – Appears on co-branded sites where Microsoft is partnering with an advertiser, this cookie identifies the advertiser so the right ad is selected.
ACH01 – Maintains information about which ad and where the user clicked on the ad.
TOptOut – Indicates that the user has indicated he or she does not want to receive behaviorally targeted ads delivered by Microsoft.

Third party cookies

Occasionally, third parties may set cookies on our websites which the IoF does not control. These are called “third party cookies”.

On some pages of our websites we may include embedded content, for example from YouTube or Twitter. When you visit a page with embedded content, the service provider (for example, YouTube) may set its own cookies on your web browser to track the success of their application or to customise their application to you.

Remember Avascular Necrosis AVN UK Support  does not control the use of these cookies and cannot access them, as cookies can only be accessed by the party who originally set them. You should check the third party websites for more information about these cookies.

How to control your cookies
Most web browsers allow some control of most cookies through the browser settings.

To find out more about cookies, including how to see what cookies have been set, visit or


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