Randomized Controlled Trial
Tapentadol immediate release versus oxycodone immediate release for treatment of acute low back pain.
Pain Physician. 2013 May 1;16(3):E237-46.
Review
Oral 5-aminosalicylic acid for maintenance of remission in ulcerative colitis.
Cochrane Db Syst Rev. 2012 Oct 17; 10: CD000544CD000544.
Randomized Controlled Trial
Subcutaneous methylnaltrexone for treatment of opioid-induced constipation in patients with chronic, nonmalignant pain: a randomized controlled study.
J Pain. 2011 May 1;12(5):554-62.