From the Department of Pathology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.

Reprints: Haeryoung Kim, MD, PhD, Department of Pathology, Seoul National University Hospital, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea. E-mail: [email protected].

The authors have no funding or conflicts to declare.