Talwar 2006.

Methods	Randomised clinical trial.
Participants	Country: India. Sample size: 40. Mean age: 35 years. Females: 5 (12.5%). Inclusion criteria: 1.ASA I scheduled for laparoscopic cholecystectomy for symptomatic gallstones. Exclusion criteria: 1. Patients with liver dysfunction, acute inflammation, cardiopulmonary or metabolic disease, or previous upper abdominal surgery.
Interventions	The participants were randomised to the following groups: Group 1: abdominal wall lift (n = 20). Group 2: pneumoperitoneum with 14 mm Hg (n = 20). Device used for abdominal lift: intra‐peritoneal device.
Outcomes	The outcomes reported were complications, conversion to open cholecystectomy, and operating time.
Notes	Attempts were made to contact the author in January 2012.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Comment: This information was not available.
Allocation concealment (selection bias)	Low risk	Quote: "Selection took place on the day before the surgery using numbered and sealed envelopes." Comment: Although information about the opacity was not reported, the review authors judge that this was probably performed
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Comment: This information was not available.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Comment: This information was not available.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Comment: There were no postrandomisation drop‐outs.
Selective reporting (reporting bias)	Low risk	Comment:  All important outcomes were reported.
Vested interest bias	Unclear risk	Comment: This information was not available.