Kappa-opioids produce significantly greater analgesia in women than in men.

Gear RW, Miaskowski C, Gordon NC, Paul SM, Heller PH, Levine JD. Kappa-opioids produce significantly greater analgesia in women than in men. Nat Med. 1996 Nov; 2(11):1248-50.

1996
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8898754

Gear RW, Miaskowski C, Gordon NC, Paul SM, Heller PH, Levine JD