Meta Analysis
Efficacy and safety of transdermal fentanyl and sustained-release oral morphine in patients with cancer and chronic non-cancer pain.
Curr Med Res Opin. 2004 Sep 1; 20 (9): 141914281419-28.
Review
Impact of morphine, fentanyl, oxycodone or codeine on patient consciousness, appetite and thirst when used to treat cancer pain.
Cochrane Db Syst Rev. 2014 May 29; 2014 (5): CD011056CD011056.
Review
Can morphine still be considered to be the standard for treating chronic pain? A systematic review including pair-wise and network meta-analyses.
Curr Med Res Opin. 2011 Jul 1; 27 (7): 147714911477-91.