Kim OY, et al. (2012) Higher levels of serum triglyceride and dietary carbohydrate intake are associated with smaller LDL particle size in healthy Korean women. Nutrition Research and Practice 6:120-125, Figure 1

What's wrong with this one?

While this is better than having an antenna chart for each group, using a separate bar for each individual is unnecessary and hard to read.

What should have been done?

It would be much better to use dots rather than bars for the individual values.