Avicii cancels all forthcoming live appearances over health concerns

Swedish DJ is still suffering issues related to surgery earlier in 2014

Chris Martin, Billie Joe Armstrong, Jon Bon Jovi to make album with Avicii

Swedish EDM star also has Serj Tankian and Matisyahu on board

Dozens of fans hospitalised after Avicii concert in Boston

More than 30 patients were taken to hospital with more treated for dehydration on-site

29 people hospitalised at Avicii show in Toronto

Most were suffering from the effects of alcohol

Avicii pulls out of Ultra Music Festival to have gall bladder removed

Deadmau5 will replace Swedish producer at Miami event