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   M Bongiovanni et al, 2016, European Journal of Endocrinology CrossRef
3. Pathological characteristics of low-risk papillary thyroid microcarcinoma with progression during active surveillance
   Mitsuyoshi Hirokawa et al, 2016, Endocrine Journal CrossRef
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   Kennichi Kakudo et al, 2021, Endocrine Journal CrossRef
5. Prognostic Factors of Papillary and Follicular Carcinomas in Japan Based on Data of Kuma Hospital
   Yasuhiro Ito et al, 2012, Journal of Thyroid Research CrossRef