预览提示词
Create a publication-quality grouped bar chart comparing tumor volume across three treatment groups over time in a mouse xenograft study. Use a single main panel with the x-axis showing four timepoints (Day 0, Day 7, Day 14, Day 21) and the y-axis labeled "Tumor Volume (mm3)" ranging 0 to 1200. At each timepoint cluster three bars: Control (gray), Drug A (teal), and Drug B (orange), each topped with black SEM error bars. Add significance brackets with asterisks above relevant pairs (ns, *, **, *** for p less than 0.05, 0.01, 0.001) comparing treatments to Control at later timepoints. Include a top-right legend mapping colors to groups and a small footnote "n = 8 per group, mean +/- SEM, two-way ANOVA with Tukey post-hoc." Keep a clean white background, thin axis lines, legible sans-serif labels, consistent bar spacing, and a tidy, balanced layout.
