ASCL1 and small cell lung carcinoma: In contrast, H69 and H209 cells exhibited high ASCL1 expression (SCLC‐A), H82 and H524 cells had high NEUROD1 expression (SCLC‐N), and H526 and H1048 cells showed high POU2F3 expression (SCLC‐P) compared to A549 cells.