] The discovery could also explain why some people are more
] susceptible to addiction -- they may have a morphine
] deficiency.
]
] "All of a sudden," Stefano said, "(morphine-deficient
] individuals) take this compound (and) it really makes
] them feel not only good but normal."
]
] A morphine deficiency could also be the cause of some
] chronic pain, Stefano said.

"Morphine deficiency" reminds me of the joke in the opening paragraph of Neuromancer.