Table 2

Flowchart of the trial

Time pointAfter admissionBefore surgerySurgeryAfter surgery
Informed consent
Patients’ background characteristics
Physical examination
Randomisation
Intervention
Observation of the surgical site□a
  • □a: From postoperative day 1 to postoperative day 30 (outpatient observation is performed at least once if the discharge is within 30 days postoperatively).