Legendary rock band Yes has cancelled its 2008 40th Anniversary Tour because frontman and founding member Jon Anderson has a respiratory ailment, the band announced today. The 26-city tour was scheduled to kick off July 12 in Quebec City, Quebec and run through August 22 in Los Angeles, CA. It would have been their first national tour in more than five years.

“In the wake of my recent respiratory attack, doctors have advised me to spend the coming months resting and recovering,” said Anderson in a statement. “Unfortunately, this means I won't be able to tour with Yes this summer as originally planned. I'd like everyone know how deeply disappointed I am by this turn of events. I was looking forward to celebrating our music with the amazing family of Yes fans once again; but as we all know, health must come before anything else. Wishing you all the very best...”

Anderson was admitted to the hospital last month after suffering a severe asthma attack. He has been diagnosed with acute respiratory failure and was told by doctors that he needs to rest and not work for a period of at least six months or suffer further health complications. With that news, the band determined that their tour plans need to be put on hold.

Ticket refunds will be available at the point of purchase.