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  Cancer Pain Relief: With a Guide to Opioid Availability - Who, World Health Organization - Google Books

  http://books.google.de/books?id=FhaII7PMHZcC&

  The second edition of a guide, which introduced a simple, yet highly effective method for the relief of cancer pain. Thoroughly revised and updated, the new edition further refines the WHO method, which advocates the use of a small number of relatively…

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  Category:Benzodiazepines – Wikimedia Commons

  https://commons.wikimedia.org/wiki/Category:Benzodiazepines?uselang=de

  Keine Beschreibung vorhanden.

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  The Psychopharmacology of Herbal Medicine: Plant Drugs that Alter Mind ... - Marcello Spinella - Google Books

  http://books.google.de/books?id=jZeaRiIFbhsC&pg=PA272&redir_esc=y#v=onepage&q&f=false

  A compilation of current scientific knowledge about psychoactive herbal drugs. Virtually all cultures consume drugs from psychoactive plants. Caffeine, for example, is probably the most common stimulant in the world, and many modern medicines, such as…

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