1. Department Nutrition & Health, Louis Bolk Institute, 3972 Driebergen, Netherlands
2. Department of Health Sciences, Mid Sweden University, 85170 Sundsvall, Sweden
3. National Information and Knowledge Center on Integrative Medicine (NIKIM), Amsterdam, Netherlands
4. Russian State Medical University, Moscow 117997, Russia
5. Deutsche Homöopathie-Union, DHU-Arzneimittel GmbH & Co. KG, 76227 Karlsruhe, Germany
6. Acomed statistik, 04275 Leipzig, Germany