Erratum to: Review of the Molecular Development of the Thumb: Digit Primera

Erratum to: Clin Orthop Relat Res DOI 10.1007/s11999-013-3008-5

In the section, Cell Death Highlights the Presumptive Thumb, a portion of text was published in error and should not be considered part of the study. That portion of text reads: (note, although the addition of “ulnar aspect” was in response to a reviewer query, in further review, loss of the thumb can also occur with reduced limb width from Shh and thus it is better to end this sentence simply as an unqualified “loss of digits”. The mechanisms are complicated.)

The author apologizes for the error.