A randomized controlled trial to compare fentanyl-propofol and ketamine-propofol combination for procedural sedation and analgesia in laparoscopic tubal ligation.
Saudi J Anaesth · 2013 · PMC3657918 · PMID 23717227
This difference was statistically extremely significant ( P <0.01).
also in 7,787 other papers
Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.