On stata: how to draw side-by-side, 2 scatter plots: a scatter plot of the logarithm of plasma norepinephrine (Y) against the logarithm of tumor volume (X), overlaid with a regression line, for the von Hippel-Lindau disease group and a similar plot for the multiple endocrine neoplasia group. On the plot for the von Hippel-Lindau disease group also show the regression line from the multiple endocrine neoplasia group. Show the scatter plots