Efektivitas pendekatan 4T (Tanya, Telaah, Tolong Nasehati dan Tindak Lanjut) dalam mempertahankan keberhasilan berhenti merokok pasien TB Paru di RSUP Persahabatan = The effectiveness of 4T approach (Tanya (Ask), Telaah (Asses), Tolong nasehati (Advise and Assist) and Tindak lanjut (Arrange)) to maintain smoking cessation for lung tuberculosis patients in Persahabatan Referral Hospital