2.2. Patients
All the patients underwent PSD surgery in our secondary level state
hospital between 01.01.2013 and 31.12.2017, were evaluated for
eligibility. The patients with missing data, under 18 years old age, who
had any immune system disease, and who were treated other treatment
procedures, were excluded from the study. The patients underwent either
SPC or EPC surgery was included in the study. The authors did not
involve in the selection of the surgery type of the patient. The
patients’ initial, perioperative and follow-up data were gathered from
the electronic health records.