{
    "PMID": "10677041",
    "TI": "Retention of supraspinal delta-like analgesia and loss of morphine tolerance in delta opioid receptor knockout mice.",
    "JT": "Neuron",
    "BTI": "",
    "DP": "1999-09",
    "AU": "Zhu Y, King M A, Schuller A G, Nitsche J F, Reidl M, Elde R P, Unterwald E, Pasternak G W, Pintar J E"
}