1. Theodor‐Kocher InstituteUniversity of BernBernSwitzerland
2. Laboratoire de Biochimie (CNRS, URA 1130)Département de Recherche FondamentaleCentre d'Etudes NucléairesGrenobleFrance
3. Boston Biomedical Research Institute and Department of Biological Chemistry and Molecular PharmacologyHarvard Medical SchoolBostonMassachusettsUSA
4. The Scripps Research InstituteDepartment of Molecular and Experimental MedicineLa JollaCaliforniaUSA