Recommended reading
[1] Eriksen J, Jensen MK, Sjøgren P, Ekholm O, Rasmussen NK. Epidemiology of non-malignant chronic pain in Denmark. Pain 2003;106:221–8.10.1016/S0304-3959(03)00225-2Search in Google Scholar
[2] Sjøgren P, Ekholm O, Peuckmann V, Grønbæk M. Epidemiology of chronic pain in Denmark: an update. European Journal of Pain 2009;13:287–92.10.1016/j.ejpain.2008.04.007Search in Google Scholar PubMed
[3] Sjøgren P, Grønbæk M, Peuckmann V, Ekholm O. A population-based cohort study on chronic pain: the role of opioids. Clinical Journal of Pain 2010;26:763–9.10.1097/AJP.0b013e3181f15dafSearch in Google Scholar PubMed
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