[1] Korea Univ, Coll Nursing, Seoul, South Korea
[2] Korea Univ, Coll Nursing, 145 Anam Ro, Seoul, South Korea
[3] Korea Univ, Coll Med, Korea Univ Hosp, Thyroid Ctr,Otorhinolaryngol Head & Neck Surg, Seoul, South Korea
[4] 1st Congress Asia Pacific Soc Thyroid Surg, Sci Comm, Seoul, South Korea