The original version of this chapter was inadvertently published with an incorrect author group. The correct sole author is Karsten Zengler.

Further, the original chapter was published without an Acknowledgement. The correct information is given below:

Acknowledgment I am grateful to Lars Behrendt, S½ren Johannes S½rensen, and Jakob Winther (University of Copenhagen, Denmark) for providing results prior to publication that led to further improvements of the method.

The original article was corrected.