https://www.surgperspective.com/clinical-experience-with-a-simple-retraction-device-in-single-port-laparoscopic-cholecystectomy-technical-description-and-initial-results/
Dr. Bernard Dauser et al. published recently a study about is experience with TPEA LIFTER in Minim Invasive Ther Allied Technol. 2014 Jan 21.
[Epub ahead of print] PubMed PMID: 24447107. Read the abstract: http://www.ncbi.nlm.nih.gov/pubmed/24447107