Adam Spiro1, Ehud Shapiro2. 1. Department of Computer Science and Applied Mathematics and Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel. 2. Department of Computer Science and Applied Mathematics and Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel. ehud.shapiro@weizmann.ac.il.
After publication of the original article [1] it was brought to our attention that important information was missing from the Acknowledgments. The completed Acknowledgments section should read as follows: