Fig. 2From: Changes of immune microenvironment in head and neck squamous cell carcinoma in 3D-4-culture compared to 2D-4-cultureThe 1st (A), 3rd (B), 6th (C) and 9th (D) day of 3D-4-cultures visualized by confocal microscopy. The cellular types were labeled respectively by CellTraceâ„¢ CSFE (green)-FaDu; Cell tracker CM-DiI (red)-HF; Cell tracker CMAC (blue)-THP-1Back to article page