From the Division of Nuclear Medicine, Department of Radiology, Seoul St Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.

Received for publication February 21, 2022; revision accepted May 28, 2022.

Conflicts of interest and sources of funding: none declared.

The study was approved by an institutional review board or equivalent and has been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. The institutional review board waived the need to obtain informed consent.

Correspondence to: Ie Ryung Yoo, MD, PhD, Division of Nuclear Medicine, Department of Radiology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea. E-mail: [email protected].