1. Triticum Exploitatie BV, Maastricht, the Netherlands;
2. Food Bioresources National Service for Medicinal, Aromatic Plants and Bee products, National Institute for Research & Development, Bucharest, Romania;
3. Laboratory of Apiculture-Sericulture, School of Agriculture and Forestry, Aristotle University of Thessaloniki, Thessaloniki, Greece;
4. Department of Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, the Netherlands