Daniel Radcliffe has waded into the transgender row involving author JK Rowling and said he hopes her comments will not "taint" the Harry Potter series.Over the weekend, the famous author sparked backlash following her remarks about menstruation after disagreeing with an article about periods.Social media users accused Rowling of being "anti-trans" – a claim she strongly denies.The actor, who portrayed the wizard in the blockbuster adaptations of the beloved book series, released a statement through LGBT suicide prevention charity The Trevor Project apologising for Rowling's social media outburst.