George Washington University internist Matthew Mintz says the safety issue "has been blown way out of proportion" and that the bigger threat is underuse, not overprescribing.

FORBES: Magazine Article

As well as politicians, the campaign is backed by other high-profile figures, including singers Elton John and George Michael, and journalist and former Conservative MP Matthew Parris.

BBC: UK party leaders back global gay rights campaign

Potter, a full-back with National Rugby League clubs Canterbury Bulldogs, St George and Perth Western Reds, cut his coaching teeth as an assistant to Matthew Elliot at Bradford Bulls from 1996-1998.

BBC: Potter to quit Dragons for Saints