Koul R, Alomrann R, Rathod S, Kim J, Leylek A, Ahmed N, Bashir B, Chowdhury A, Tan L, Dubey A. Clinical Characteristics and Prognosis of Primary Tracheal Cancer: A Single Institution Experience. Int J Hematol Oncol Stem Cell Res. 2018;12(4):297-301.