1. Cancer Statistics, 2021.;Jemal;CA Cancer J Clin,2021
2. Pathology and Classification of SCLC.;Wistuba;Cancers (Basel),2021
3. Immunohistochemical characteristics of brain metastases and corresponding primary lung cancer.;Georgieva Slavova;J BUON,2019
4. Immunotherapy in extensive small cell lung cancer.;Singh;Exp Hematol Oncol,2019
5. Howlader, Noone, Krapcho, Miller, Brest, Yu, Ruhl, Tatalovich, Mariotto, Lewis, Chen, Feuer, Cronin. SEER Cancer Statistics Review, 1975-2018, National Cancer Institute. 2021. https://seer.cancer.gov/csr/1975_2018/.