RT Journal Article SR Electronic T1 Treatment outcomes among childhood extensively drug-resistant tuberculosis patients in Pakistan JF ERJ Open Research JO erjor FD European Respiratory Society SP 00551-2021 DO 10.1183/23120541.00551-2021 VO 8 IS 1 A1 Abubakar, Muhammad A1 Ahmad, Nafees A1 Atif, Muhammad A1 Hayat Khan, Amer A1 Ghafoor, Abdul YR 2022 UL http://openres.ersjournals.com/content/8/1/00551-2021.abstract AB