“Effectiveness of non-steroidal anti-inflammatory drugs for the treatment of pain in knee and hip osteoarthritis: a network meta-analysis,” by Bruno R. da Costa, Stephan Reichenbach, Noah Keller, Linda Nartey, Simon Wandel, Peter Juni, and Sven Trelle (Vol. 387, No. 10033, May 21, 2016, p. 2093-2105).
www.thelancet.com/journals/lancet/article/PIIS0140-6736%2816%2930002-2/abstract
