Faktor yang Mempengaruhi Tingkat Kepositifan Biopsi Transbronchial Needle Aspiration Konvensional Kelenjar Getah Bening Paratrakeal Kanan Bawah dan Subkarina di RSUP Persahabatan Jakarta = Influence the Level of Positivity of Conventional Transbronchial Needle Aspiration Biopsy of Lower Right Paratracheal and Subcarinal Lymph Nodes at Persahabatan Hospital Jakarta