1. Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
2. Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
3. Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain
4. Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), 20080 Donostia, Euskadi, Spain