At the beginning of the twenty-first century, pain began to be identified in clinical research and medical settings as a fifth vital sign (in addition to pulse, blood pressure, temperature, and respiration). Pain has become such a common medical problem in the USA...
CITATION STYLE
Gatchel, R. J., Haggard, R., Thomas, C., & Howard, K. J. (2018). Biopsychosocial Approaches to Understanding Chronic Pain and Disability. In Handbook of Pain and Palliative Care (pp. 3–22). Springer International Publishing. https://doi.org/10.1007/978-3-319-95369-4_1
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