Interferon Gamma Release Assay versus Tuberculin Skin Testing among Healthcare Workers of Highly Diverse Origin in a Moderate Tuberculosis Burden Country. oleh Sahal Al Hajoj, Bright Varghese, Alria Datijan, Mohammed Shoukri, Ali Alzahrani, Abdallah Alkhenizan, Abdulaziz AlSaif, Sahar Althawadi, Grace Fernandez, Abdulrahman Alrajhi