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	1.	Analgesic and adverse effects of a fixed-ratio morphine-oxycodone combination (MoxDuo) in the treatment of postoperative pain. [electronic resource] by Richards, Patricia Riff, Dennis Kelen, Robin Stern, Warren Producer: 20110823 In: Journal of opioid management vol. 7 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	A double-blind, placebo-controlled study of dual-opioid treatment with the combination of morphine plus oxycodone in patients with acute postoperative pain. [electronic resource] by Webster, Lynn Richards, Patricia Stern, Warren Kelen, Robin Producer: 20101116 In: Journal of opioid management vol. 6 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	A phase 3, randomized, double-blind comparison of analgesic efficacy and tolerability of Q8003 vs oxycodone or morphine for moderate-to-severe postoperative pain following bunionectomy surgery. [electronic resource] by Richards, Patricia Riff, Dennis Kelen, Robin Stern, Warren Producer: 20140317 In: Pain medicine (Malden, Mass.) vol. 14 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	4.	Comparison of the efficacy and safety of dual-opioid treatment with morphine plus oxycodone versus oxycodone/acetaminophen for moderate to severe acute pain after total knee arthroplasty. [electronic resource] by Richards, Patricia Gimbel, Joseph S Minkowitz, Harold S Kelen, Robin Stern, Warren Producer: 20131017 In: Clinical therapeutics vol. 35 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	5.	Analgesic efficacy and tolerability of intravenous morphine versus combined intravenous morphine and oxycodone in a 2-center, randomized, double-blind, pilot trial of patients with moderate to severe pain after total hip replacement. [electronic resource] by Joppich, Robin Richards, Patricia Kelen, Robin Stern, Warren Zarghooni, Kourosh Otto, Christina Böhmer, Andreas Petzke, Frank Treptau, Tilman Lefering, Rolf Bäthis, Holger Neugebauer, Edmund Producer: 20121228 In: Clinical therapeutics vol. 34 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)