[1] Seoul Natl Univ, Sch Dent, Dept Oral & Maxillofacial Radiol, 101 Daehak, Seoul 03080, South Korea
[2] Seoul Natl Univ, Dent Res Inst, Sch Dent, 101 Daehak Ro, Seoul 03080, South Korea
[3] Wonkwang Univ, Daejeon Dent Hosp, Coll Dent, Dept Oral & Maxillofacial Radiol, Iksan, South Korea
[4] Yonsei Univ, Coll Dent, Dept Oral & Maxillofacial Radiol, Seoul, South Korea
[5] Gangneung Wonju Natl Univ, Res Inst Oral Sci, Coll Dent, Dept Oral & Maxillofacial Radiol, Kangnung, South Korea
[6] Kyungpook Natl Univ, Inst Human Bioresource, Sch Dent, Dept Oral & Maxillofacial Radiol, Daegu, South Korea
[7] Univ Ulsan Coll Med, Asan Med Ctr, Dept Radiol, Seoul, South Korea
[8] Univ Ulsan, Res Inst Radiol, Asan Med Ctr, Coll Med, Seoul, South Korea
[9] Sungkyunkwan Univ Sch Med, Radiol & Ctr Imaging Sci, Samsung Med Ctr, Seoul, South Korea
[10] Sungkyunkwan Univ Sch Med, Cardiac & Vasc Ctr, Samsung Med Ctr, Dept Radiol, Seoul, South Korea
[11] Kyung Hee Univ, Kyung Hee Univ Hosp Gangdong, Coll Med, Dept Radiol, Seoul, South Korea
[12] Severance Hosp, Dept Diagnost Radiol, Seoul, South Korea
[13] Kangwon Natl Univ Hosp, Dept Radiat Oncol, Chunchon, South Korea
[14] Seoul Natl Univ Coll Med, Dept Radiol, Seoul, South Korea
[15] Konkuk Univ Sch Med, Med Ctr, Dept Radiol, Seoul, South Korea