1. BeeLife European Beekeeping Coordination, Louvain la Neuve, Belgium.
2. Laboratoire de Biodiversité du Sol, Instituts de Biologie et d'Ethnologie, Université de Neuchâtel, Neuchâtel, Switzerland.
3. Laboratoire Evolution, Génomes, Comportement, Ecologie, Centre National de la Recherche Scientifique (CNRS), Gif-sur-Yvette, France.
4. Centre de Biophysique Moléculaire, CNRS, 45071 Orléans, France.
5. Institute of Animal Science, Department of Apiculture, ELGO DIMITRA, Thessaloniki, Greece.
6. Council for Agricultural Research and Economics, Agriculture and Environment Research Centre, Bologna, Italy.
7. Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum Università di Bologna, Bologna, Italy.