Adler singer Jacob Bunton has released a statement saying: "We are truly sorry to all of the fans and promoters who were looking forward to seeing us on the road, but right now Steven's health is the most important thing. We hope to make it up to everyone when Steven recovers."

Adler has been fighting addiction issues since the 1980s and lost his job with Axl Rose's outfit in 1990 due to his inability to control his drinking and drug-taking.