Huygens SA, Goossens LMA, van Erkelens JA, et al. How much does a heart valve implantation cost and what are the health care costs afterwards? Open Heart 2018;5:e000672. doi: 10.1136/openhrt-2017-000672.

There is a mistake in figure 2 and it should be replaced with the following:

Figure 2 Annual healthcare costs during the first three postintervention years of surgical valve replacement patients and controls divided by age group.