Mice deficient for δ- and μ-opioid receptors exhibit opposing alterations of emotional responses

Authors: Dominique Filliol, Sandy Ghozland, Johanna Chluba, Miguel Martín, Hans W. D. Matthes, Frédéric Simonin, Katia Befort, Claire Gavériaux‐Ruff, Andrée Dierich, Marianne LeMeur, Olga Valverde, Rafaël Maldonado, Brigitte L. Kieffer - Nature Genetics 2000 cited by 668