@inbook{d4996596ce7842b4b58990ab1db8b11f,
title = "Natural mechanisms of pain inhibition",
author = "Morgan, \{M. M.\} and Raz Yirmiya and P. Marek and Liebeskind, \{John C.\}",
year = "1989",
language = "American English",
isbn = "9780881675191",
series = "Advances in Pain Research \& Therapy",
publisher = "Raven Press",
pages = "311--318",
editor = "Hill, \{C. Stratton \} and Fields, \{William S. \}",
booktitle = "Drug Treatment of Cancer Pain in a Drug-Oriented Society",
address = "United States",
}