1. Department of Biochemistry and Molecular Biology ISchool of BiologyComplutense University 28040 Madrid Spain
2. Max‐Planck Institute of Psychiatry 80804 Munich Germany
3. Washington University Seattle Washington 98195
4. The Skaggs Institute for Chemical BiologyDepartment of Cell BiologyThe Scripps Research Institute La Jolla California 92037
5. Laboratory of Neural Stem Cell BiologyLund Strategic Research Center for Stem Cell Biology and Cell TherapyUniversity Hospital SE‐221 84 Lund Sweden