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. 2014 Winter;2(1):26–29.

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© 2014 Shahid Beheshti University of Medical Sciences. All rights reserved.

This is an open-access article distributed under the terms of the Creative Commons Attribution NonCommercial 3.0 License (CC BY-NC 3.0), (http://creativecommons.org/licenses/by-nc/3.0/)which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly.

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The Kaplan-Meier curve to show the success rate in patients’ underling treatment with two drug regimens of morphine + placebo and morphine + citalopram. Log rank test showed a significant difference in treatment success between the two groups (P=0.001).