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Low Vitamin D Levels Are Associated with Higher Opioid Dose in Palliative Cancer Patients – Results from an Observational Study in Sweden
- Peter Bergman,
- Susanne Sperneder,
- Jonas Höijer,
- Jenny Bergqvist,
- Linda Björkhem-Bergman
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- Published: May 27, 2015
- https://doi.org/10.1371/journal.pone.0128223