1 Department of Nuclear Medicine, Seoul National University Hospital, 101, Daehak-ro Jongno-gu, Seoul 03080, Korea. Electronic address: murad.vanessa@gmail.com.
2 Department of Nuclear Medicine, Seoul National University Hospital, 101, Daehak-ro Jongno-gu, Seoul 03080, Korea; Department of Radiological Sciences, University of California Medical Center, Irvine, USA; Department of Medical Oncology, Kyunghee University Medical Center, Korea.