Fig. 1From: Incidence, survival comparison, and novel prognostic evaluation approaches for stage iii-iv pulmonary large cell neuroendocrine carcinoma and small cell lung cancerStudy flow diagram. Abbreviation: LCNEC, large cell neuroendocrine carcinoma; SCLC, small cell lung cancer; NSCLC, non-small cell lung cancer; OS, overall survival; SEER, the Surveillance Epidemiology and End Results; PSM, propensity score matchingBack to article page