1. Does frog toxin represent a giant leap for treatment of pain?
Gastroenterology 
Volume 114, Issue 3, (March 1998)
DOI: /S (98)
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2. Two different pharmacological approaches to pain control
Two different pharmacological approaches to pain control. The left side shows the traditional pathway acting through activation of opiate receptors and the right side shows the new pathway acting through activation of cholinergic, nicotinic receptors.
Gastroenterology  , DOI: ( /S (98) )
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