Evaluation of the discrepancies between the results of GeneXpert (MTB / RIF) assay and drug-susceptibility tests among drug-resistant pulmonary tuberculosis patients at Jakarta Friendship Center General Hospital = Evaluasi perbedaan antara hasil uji GeneXpert (MTB / RIF) dan tes sesitivitas obat di antara pasien tuberkulosis paru yang resistan di Rumah Sakit Umum Pusat Persahabatan Jakarta