APA
Di Lorenzo L., Foti C., Forte A. M., Palmieri E., Formisano R., Vatakencherry A. & Pappagallo M. (20110228). The addition of tramadol as a second opioid may improve pain relief in severe osteoarthritis: a prospective study. : Pain practice : the official journal of World Institute of Pain.
Chicago
Di Lorenzo Luigi, Foti Calogero, Forte Alfonso Maria, Palmieri Enzo, Formisano Rita, Vatakencherry Abraham and Pappagallo Marco. 20110228. The addition of tramadol as a second opioid may improve pain relief in severe osteoarthritis: a prospective study. : Pain practice : the official journal of World Institute of Pain.
Harvard
Di Lorenzo L., Foti C., Forte A. M., Palmieri E., Formisano R., Vatakencherry A. and Pappagallo M. (20110228). The addition of tramadol as a second opioid may improve pain relief in severe osteoarthritis: a prospective study. : Pain practice : the official journal of World Institute of Pain.
MLA
Di Lorenzo Luigi, Foti Calogero, Forte Alfonso Maria, Palmieri Enzo, Formisano Rita, Vatakencherry Abraham and Pappagallo Marco. The addition of tramadol as a second opioid may improve pain relief in severe osteoarthritis: a prospective study. : Pain practice : the official journal of World Institute of Pain. 20110228.