Peran diagnostik Interferon-Gamma Release Assay (IGRA) metode Elispot pada pasien terduga kolitis tuberkulosis di RSUPN Dr. Cipto Mangunkusumo = Diagnostic role of Interferon-Gamma Release Assay (IGRA) with Elispot method in patients suspected with Colitis Tuberculosis at Dr. Cipto Mangunkusumo National Hospital