The efficacy of intranasal leptin for opioid-induced respiratory depression depends on sex and obesity state oleh Michele L. Singer, Mi-Kyung Shin, Lenise J. Kim, Carla Freire, O Aung, Huy Pho, Joshua A. East, Frank P. Sgambati, Alban Latremoliere, Luu V. Pham, Vsevolod Y. Polotsky, Vsevolod Y. Polotsky