107 The 'Standard Guidelines for Corrections in Australia (Revised 2004)' ('National Guidelines'), which have apparently been endorsed by the Victorian Department of Justice,[40] are based on the United Nations Standard Minimum Rules for the Treatment of Prisoners and related recommendations, as well as the Council of Europe Standard Minimum Rules. In relation to access to health services, the National Guidelines specify that every prisoner is to have access to 'evidence based' health services provided by a competent, registered health professional who will provide a standard of health services comparable to that of the general community, and that every prisoner is to have access to the services of specialist medical practitioners as well as psychiatric, dental, optical and radiological diagnostic services.[41] Referral to such services should take account of community standards of health care.[42] Prisoners should be able to receive treatment from private health professionals, provided they can meet the costs and there are reasonable clinical grounds for granting the application and the request falls within the relevant statutory requirements.[43] Finally, where a prisoner is under medical treatment upon being received into prison, that prisoner should be permitted to maintain contact, on the approval of the prison health service, with the medical service that was treating the prisoner.[44]