Arno Hazekamp of Leiden University, The Netherlands, entered into the discussion by Dr. Lester Grinspoon and Dr. Ethan Russo on the future of medical cannabis with a letter to the journal CANNABINOIDS entitled "The herbal way - a response to Ethan Russo", available now online at the journal's website: http://www.cannabis-med.org/english/home.htm. Arno Hazekamp has finished his doctoral thesis with the title "Cannabis, extracting the medicine" with ten chapters on medicinal cannabis. It is available from the author free of charge by sending an e-mail to ahazekamp@rocketmail.com.