What type of Study is This?
Mehlisch DR, Aspley S, Daniels SE, et al. A single-tablet fixed-dose combination of racemic ibuprofen/paracetamol in the management of moderate to severe postoperative dental pain in adult and adolescent patients: a multicenter, two-stage, randomized, double-blind, parallel-group, placebo-controlled, factorial study. Clin Ther. 2010;32(6):1033-1049.
Answer: Randomized controlled trial