Frédéric B. Piel, PhD, Thomas V. Adamkiewicz, MD, Djesika Amendah, PhD, Thomas N. Williams, MD, PhD, Sunetra Gupta, PhD and Scott D. Grosse, PhD

Genet Med advance online publication, 3 December 2015; doi:10.1038/gim.2015.143

In the published version of this article, Figure 1 was incorrect. The correct figure is shown below.

Figure 1
figure 1

Distribution and size of newborn screening surveys of hemoglobin S and hemoglobin C in Africa and the Middle East.

In the version of this article published online, Figure 1 was incorrect. The correct figure is shown below.

In addition, the Supplementary Tables S3 and S4 were presented out of order. They appear online via the online version of this erratum.

The publisher regrets the error.