Pharmaceuticals and medical equipment do not fall under international sanctions, but Iran is facing shortages of drugs for the treatment of 30 illnesses—including cancer, heart and breathing problems, thalassemia and multiple sclerosis (MS)—because it is not allowed to use international payment systems.[6] According to a survey by the Woodrow Wilson International Center for Scholars, drug imports to Iran from the United States and Europe declined by around 30% in 2012.[7]