1. Department of Physics, King’s College London, Strand, London WC2R 2LS, United Kingdom
2. Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, UiT The Arctic University of Norway, N-9037 Tromsø, Norway
3. Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA
4. Molecular Sciences Software Institute, Blacksburg, Virginia 24060, USA
5. Department of Chemistry, University of Cambridge, Cambridge, United Kingdom