환자들은 방사선학적 소견에 근거하여 두 그룹(그룹 A, n = 206, 침입 의심 없음, 그룹 B, n =130, 침임 의심 있음)으로 구분되었다.
Patients were divided into two groups (Group A; n=206, not suspicious for invasion, Group B; n=130, suspicious for invasion group) based on the radiologic finding.