Fibromyalgia is a syndrome characterized by chronic and widespread musculoskeletal pain,
often accompanied by other symptoms, such as fatigue, intestinal disorders and alterations …

Fibromyalgia is a disorder that is part of a spectrum of syndromes that lack precise
classification. It is often considered as part of the global overview of functional somatic …

Abstract The World Health Organization regards chronic pain to be a public health concern.
In clinical medicine, fibromyalgia (FM) is the most prevalent chronic widespread pain …

This paper is the thirty-seventh consecutive installment of the annual review of research
concerning the endogenous opioid system. It summarizes papers published during 2014 …

Low back pain (LBP) is the world's leading debilitating condition [1]. It is estimated that 80%
of the general population in the United States will develop LBP at one point in time [2],[3] …

Fibromyalgia (FM) is a chronic pain syndrome that affects the central nervous system and
generates disability, which is characterized by generalized pain, fatigue, and functional …

Methods: Participants with OUD (n= 141) were recruited from an academic addiction
treatment center in Columbus, Ohio. An established surrogate measure of CS, the American …

Background: There is obvious difference in individual response to opioids. Many studies
have examined the correlation between the μ-opioid receptor 1 (OPRM1) 118A> G genetic …

Background Dysregulation of the μ‐opioid receptor has been reported in fibromyalgia (FM)
and was linked to pain severity. Here, we investigated the effect of the functional genetic …

To investigate the association between three selected pain polymorphisms and clinical,
functional, sensory-related, psychophysical, psychological or cognitive variables in a sample …