Former HELMET frontman Page Hamilton will not be filling in on guitar for SILVERCHAIR singer Daniel Johns during the latter band's upcoming live appearances, SILVERCHAIR manager John Watson told Britain's Metal Hammer magazine."While it is true that Page was willing to step in to help out with these shows, Daniel has decided that if he's not well enough to play the guitar, he's not going to be well enough to be a 'frontman' either, so a 'stand-in' guitarist is, unfortunately, not an option," Watson said. As previously reported, Daniel Johns is suffering from reactive arthritis, with which he was first diagnosed earlier in the year. Unlike the more widely known types of arthritis such as rheumatoid arthritis and osteoarthritis, reactive arthritis is usually not a degenerative condition. This means that nearly everybody who suffers from it makes a full recovery. It occurs in about six percent of the male population usually only once in a lifetime and, as the name implies, it is caused by a severe reaction to an underlying virus. The disease causes swelling of the joints and very considerable pain. SILVERCHAIR are set to play New York's Bowery Ballroom on Wednesday, June 5th and Thursday, June 6th, to be followed by an appearance in London at the Shepherds Bush Empire on Wednesday, June 12th. The group's new album, Diorama, is scheduled for release on July 30th through Atlantic Records.