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Life Sciences|January 1, 1990
Amniotic-fluid ingestion by parturient rats enhances pregnancy-mediated analgesiaM B Kristal, A C Thompson, P Abbott, et al.Physiology & Behavior|November 1, 1991
Placental opioid-enhancing factor (POEF): generalizability of effectsP Abbott, A C Thompson, E J Ferguson, et al.Pageof 4