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

Pattana‐arun 2006.

Methods Assignment: sealed envelop 
 Follow‐up: 
 4 weeks
Participants Grade 3 and 4 hemorrhoids. 
 Exclusion: 
 previous or concomitant anorectal disease, thrombosed or strangulated hemorrhoids, compromised patients, pregnancy and history of bleeding tendency.
Interventions Ligasure and conventional closed technique (Fansler)
Outcomes Operating time, pain, analgesics use, wound dehiscence, complications
Notes MJS 4
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment (selection bias) High risk C ‐ Inadequate