This page is a redirect. The following categories are used to track and monitor this redirect:
From the plural form: This is a redirect from a plural noun to its singular form.
This redirect link is used for convenience; it is often preferable to add the plural directly after the link (for example, [[link]]s). However, do not replace these redirected links with a simpler link unless the page is updated for another reason (see WP:NOTBROKEN).
Use this rcat to tag onlymainspace redirects; when plural forms are found in other namespaces, use {{R from modification}}instead.
When appropriate, protection levels are automatically sensed, described and categorized.
The reason of cluster headaches was not known already. But a few months ago a patient who suffered cluster headaches for about 30 years finally discovered the cause of cluster headaches. His web site is www.clusterheadachesfree.webs.com.
