+These authors contributed equally to this work.
++Present address: European Molecular Biology Laboratory, 22603 Hamburg, Germany.
+++These authors contributed equally to this work.
++++Present address: Brookhaven National Laboratory, Upton, NY 11973, USA.
1The most recent workshop, CSX2012, took place in 2012 at the ETH in Zurich, Switzerland, and the next instance is organized by Brookhaven National Laboratory, USA, in 2014.