LGALS9 and nasopharyngeal carcinoma: From parental NPC cells, we generated Gal-9 stably overexpressed or knockdown NPC cells including TW03-Gal-9 and C666-1-sh-Gal-9 and their corresponding control cells including TW03-EV (empty vector) and C666-1-sh-control cells for further studies (Supplementary Fig. S1b, c).