@article{202001.0138,
	doi = {10.20944/preprints202001.0138.v1},
	url = {https://doi.org/10.20944/preprints202001.0138.v1},
	year = 2020,
	month = {January},
	publisher = {Preprints},
	author = {Shatha Rouf Moustafa and Khalid F. Al-Rawi and Arafat Hussein Al-Dujaili and Thitiporn Supasitthumrong and Hussein Kadhem Al-Hakeim and Michael Maes},
	title = {The Endogenous Opioid System in Schizophrenia and Treatment Resistant Schizophrenia: Increased Plasma Endomorphin 2, and κ and μ Opioid Receptors are Associated with Interleukin-6},
	journal = {Preprints}
}