Do HTTP Headers like Cache-Control, Pragma and Cookies affect Google Rank?

[buguela]

Hi,

I was analyzing my HTTP server reply and I found this:
#1 Server Response: http://www.example.com
HTTP Status Code: HTTP/1.1 200 OK
Date: Tue, 11 Nov 2008 11:27:51 GMT
Server: Apache/2.0.54
X-Powered-By: PHP/5.2.6
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: PHPSESSID=f791821b56da93a65aa4b4e40b63a5de; path=/
Vary: Accept-Encoding
Connection: close
Content-Type: text/html

I want to know if "Expires", "Cache-Control", "Pragma" and "Set-Cookie" affect any SERPS? Should I remove them? Any tips?

[edited by: tedster at 12:24 pm (utc) on Nov. 11, 2008]
[edit reason] switch to example.com - it can never be owned [/edit]

[tedster]

To my knowledge there is no effect on ranking here. They are instructions either for a browser, or a 3rd party caching server, but not for a spider. Certainly googlebot does not accept cookies, for example.