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Webster, Lynn R., Srinivas Nalamachu, Bart Morlion, Jyotsna Reddy, Yuko Baba, Tadaaki Yamada, and Juan C. Arjona Ferreira. "Long-term Use of Naldemedine in the Treatment of Opioid-induced Constipation in Patients With Chronic Noncancer Pain: A Randomized, Double-blind, Placebo-controlled Phase 3 Study." Pain 2018.

Webster, Lynn R., et al. "Long-term Use of Naldemedine in the Treatment of Opioid-induced Constipation in Patients With Chronic Noncancer Pain: A Randomized, Double-blind, Placebo-controlled Phase 3 Study." Pain 2018.