In preparing this study, states the report, the Pew Forum devised a battery of measures, phrased as questions, to gauge the levels of government and social restrictions on religion in each country. "To answer these questions, Pew Forum researchers combed through 16 widely cited, publicly available sources of information, including reports by the US State Department, the US Commission on International Religious Freedom, the UN Special Rapporteur on Freedom of Religion or Belief, the Council of the European Union, the United Kingdom's Foreign and Commonwealth Office, Human Rights Watch, the International Crisis Group, the Hudson Institute and Amnesty International,'' it states.