In the Discussion, two messages regarding incorrect classifications and their associated results have been removed as follows: - Page 18, line 22 to 25: “Class II obesity showed a trend toward higher treatment requirements and medical complications, with an odds ratio of 2.9 (p-value 0.222) and 9.8 (p-value 0.090), respectively.
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Preoperative admission is non-essential in most patients receiving elective laparoscopic cholecystectomy: A cohort study.
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