1 Subcommittee for Provings of the European Committee for Homeopathy (ECH), Reinhardtstrasse 37, 10117 Berlin, Germany. Electronic address: provings@homeopathyeurope.org.
2 Proving Working Group of the Liga Medicorum Homeopathica Internationalis (LMHI), Durban University of Technology, Box 1334, 4000 Durban, South Africa. Electronic address: ashleyr@dut.ac.za.