“…The 2005 AUC were used by 6 studies, 16,18,19,39,42,44 and the remainder used the 2009 AUC. 10–15,17,20,34–38,40,41,43 Single-photon emission computed tomography (SPECT) was the modality utilized in most of the studies, 13–20,34–36,38,39,41–44 one study reported using positron emission tomography (PET), 12 while the remainder of the studies did not specify. 10,11,37,40 Among the included studies, 5 were conducted outside the United States.…”