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APA Citation
Webster, L., Chey, W. D., Tack, J., Lappalainen, J., Diva, U., & Sostek, M. (2014). randomised clinical trial: the long‐term safety and tolerability of naloxegol in patients with pain and opioid‐induced constipation. Alimentary pharmacology & therapeutics, 40(7), 771–779. http://access.bl.uk/ark:/81055/vdc_100024909256.0x00004e