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. 2009 Jan 21;2009(1):CD006761. doi: 10.1002/14651858.CD006761.pub2

Chung 2003.

Methods Assignment: alternating 
 Follow‐up: 
 4 months
Participants Grade 3 and 4 hemorrhoids.
Interventions Ligasure and conventional closed technique (Ferguson)
Outcomes Operating time, pain, complications, wound swelling, hospital stay, return to work
Notes MJS 3
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment (selection bias) High risk C ‐ Inadequate