Jean-François Chenot , Annette Becker , Corinna Leonhardt , Stefan Keller , Norbert Donner-Banzhoff , Erika Baum , Michael Pfingsten , Jan Hildebrandt , Heinz-Dieter Basler and Michael M Kochen
BMC Complementary and Alternative Medicine 2007, 7:42doi:10.1186/1472-6882-7-42