How to make a waterfall plot with ggpubr

Results from clinical trials in oncology is often presented as a waterfall plot. The plot visualize how tumor growth is affected by treatment for each subject after a given time. It can communicate very effectively the overall results for an entire study using only one figure. A waterfall plot is in essence a bar-chart ordered according to size. Each bar represents one subject and describes how much in % a tumor has changed from baseline (start of treatment), to the defined end of treatment.