Spine
-
A questionnaire survey. ⋯ 3.
-
Retrospective analysis. ⋯ 4.
-
Randomized Controlled Trial Comparative Study
Intrathecal Versus Intravenous Morphine in Minimally Invasive Posterior Lumbar Fusion: A Blinded Randomized Comparative Prospective Study.
A blinded, randomized, comparative prospective study. ⋯ 2.