1. Laboratoire de Chimie Quantique, Institut de Chimie, Université de Strasbourg, 1, Rue Blaise Pascal, F-67008 Strasbourg, France
2. National Research Council Canada, Measurement Science and Standards, 1200 Montreal Road M-12, B-12, Ottawa, ON K1A 0R6, Canada
3. National Research Council Canada, Measurement Science and Standards, 1200 Montreal Road M-12, G-7, Ottawa, ON K1A 0R6, Canada
4. Purdue University, Department of Chemistry, Office WTHR 107E, 560 Oval Drive, West Lafayette, IN 47907, USA
5. Royal Military College of Canada, Department of Chemistry and Chemical Engineering, P.O. Box 17000, Stn. Forces, Kingston, ON K7K 7B4, Canada
6. Bureau International des Poids et Mesures (BIPM), Pavillon de Breteuil, F-92312 Sèvres Cedex, France
7. Chair Commission I.1 Green Book, Chair Mole Project, ZHAW Zurich University of Applied Sciences, ICBT Institute of Chemistry and Biotechnology, Einsiedlerstrasse 31, CH-8820 Wädenswil, Switzerland