A report produced by the World Health Organisation (WHO) for the Conference of the Parties to the WHO Framework Convention on Tobacco Control, found there was not enough evidence to determine if electronic cigarettes could help people quit smoking, but allowed for the possibility and made various recommendations as to a suitable regulatory framework for them. It suggested that smokers should be encouraged to use approved methods for help when quitting, but also cited expert opinions in scientific papers that suggested e-cigarettes could have a role helping people quit who have failed using other methods.