[1] Cha Univ, Coll Med, Kangnam Cha Hosp, Div Breast & Thyroid Surg,Dept Surg, Seoul 135081, South Korea
[2] Kyung Hee Univ, Coll Med, Med Ctr, Dept Surg, Seoul, South Korea
[3] Kyung Hee Univ, Coll Med, Kyunghee Univ Hosp Gangdong, Dept Surg, Seoul, South Korea
[4] Kwandong Univ, Coll Med, Myongji Hosp, Dept Surg, Goyang, South Korea
[5] Sungkyunkwan Univ, Samsung Med Ctr, Dept Surg, Seoul, South Korea
[6] Konkuk Univ, Coll Med, Med Ctr, Dept Surg, Seoul, South Korea
[7] Korean Breast Canc Soc, Seoul, South Korea