[1] Univ Insubria Varese, Dept Gen Surg, Endocrine Surg Ctr, Viale Borri 57, Varese, Italy
[2] Jilin Univ, Japan Union Hosp, Div Thyroid Surg, Jilin Prov Key Lab Surg Translat Med, Changchun 130033, Peoples R China
[3] Korea Univ, KUMC Thyroid Ctr, Dept Surg,Anam Hosp, Div Breast & Endocrine Surg,Minimally Invas Surg, Seoul, South Korea
[4] Sun Yat Sen Univ, Affiliated Hosp 3, Guangzhou 510630, Guangdong, Peoples R China