David Casanova has left our group as of July 1st 2013 and moved to Ikerbasque, the Basque Foundation for Science. After obtaining his Ph.D. in our group in 2006 and a postodoctoral stay at UC Berkely with Martin Head-Gordon, he was back at the Universitat de Barcelona as a Ramón y Cajal Researcher. We appreciate the numerous contributions and initiatives that David has developed while in our group, wish him a successful endeavour in his new position in Donosti (San Sebastián) and expect to continue to collaborate with him in the future.