This is a long article, but 2/3rds down, you get to this:

Cornell entered rehab for alcohol and Oxycontin abuse after the release of Audioslave's first album, and the band supported him through it (two months ago, he quit smoking as well). "This band, whom I didn't know that well at that point, didn't have animosity towards me; they weren't concerned with their careers; they seemed to have actual concern about me and my personal health, and that was motivating," says Cornell. "It kind of still is, and makes me want to stay really involved in the band and to give back to those guys."

RELATED NEWS

Tom Morello recording new material
Related Artist/Band(s): Audioslave [FB]  Rage Against The Machine [FB] 

Tom Morello Working On First Heavy Rock Album Since Audioslave
Related Artist/Band(s): Audioslave [FB] 

Tom Morello and Tim McIlrath (Rise Against) perfom at NATO Protest in Chicago
Related Artist/Band(s): Audioslave [FB]  Rage Against The Machine [FB]  Rise Against [FB]  The Nightwatchman [FB] 

Green Day, Offspring, AFI, Foo Fighters among Billboard's Top 50 Rock Artists of the 2000s
Related Artist/Band(s): AFI [FB]  Audioslave [FB]  Blink-182 [FB]  Foo Fighters [FB]  Green Day [FB]  Jimmy Eat World [FB]  Metallica [FB]  The Offspring [FB]  Pearl Jam [FB]  Queens Of The Stone Age [FB]  Rage Against The Machine [FB]  Red Hot Chili Peppers [FB]  Sum 41 [FB]  System Of A Down [FB]  U2 [FB]  Weezer [FB]  The White Stripes [FB]  Nine Inch Nails [FB]  The Killers [FB] 

Nightwatchman Alone Without You Video
Related Artist/Band(s): Audioslave [FB]  Rage Against The Machine [FB]  The Nightwatchman [FB]