Annals of oncology : official journal of the European Society for Medical Oncology
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Review Meta Analysis
Prevalence of pain in patients with cancer: a systematic review of the past 40 years.
Despite the abundant literature on this topic, accurate prevalence estimates of pain in cancer patients are not available. We investigated the prevalence of pain in cancer patients according to the different disease stages and types of cancer. ⋯ Despite the clear World Health Organisation recommendations, cancer pain still is a major problem.