Campbell wrote to fans on Tuesday via his Facebook page, "Home... So glad that's over. Time to recover/recuperate and grow some hair. Thanks for all the love you've sent - much appreciated! Normal service will be resumed shortly."

Prior to the treatment, Vivian wrote the following message to fans on September 29th on his Facebook page, "As many of you know, I've been scheduled to start a stem cell transplant and as soon as I got home from tour I began the necessary tests and preparations. I'll be admitted to hospital soon for all the yucky bits, so in the meantime I'm headed to Target to stock up on cozy pajamas, fresh underwear, and a sackful of car-porn."

He continued, "While I can't say that I'm looking forward to the process ahead, I'm very much looking forward to what I feel will be a most successful outcome. Next year will be very busy for Def Leppard with a new album and a world tour, and frankly, I don't think they would sound as loud without me, so I have no intention of letting the team down! See you all (with hair!) in 2015."