Los Angeles, March 14 (IANS) Stand-up comedian Brody Stevens' struggle with mental illness is listed as a factor in his suicide on his death certificate.TMZ obtained the document which confirms that Brody died by hanging. It specifically says he used a belt to hang himself from a door. It also says his "history of depression and bipolar disorder" was a significant condition contributing to his death.The comedian and actor was found dead last month at his home in Los Angeles. He had been hospitalised in 2011 after suffering a bipolar episode, and tackled topics like depression on his Comedy Central series, "Enjoy It!"Despite that, he was famous for preaching positivity during his popular stand-up act. He also had roles in movies such as "The Hangover" and "The Hangover II".He was 48. --IANS nn/rb/bg