Meanwhile, Ozzy Osbourne has maintained that Tony Iommi will recover from his battle against lymphoma.
Ozzy told The Boneyard: "He's going to beat it. What it's down to is determination and believe me, this guy's got more determination than anybody I've ever met. It's going to be fine. It's just one of those trials in life that happen."
He added: "When the bombshell hit about Tony's cancer problem, I came to England. It would've been pretty bad if I would've stayed in LA.
"He's got so much support, not only from each one of us in the band, but the fanbase; it's unbelievable. It's one of them problems you have in life. He isn't going to die, I'm telling you. I told him if he dies, I'm going to kill him."