RT Journal Article SR Electronic T1 The Annual Journal Impact Factor Saga JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP jnumed.121.262860 DO 10.2967/jnumed.121.262860 A1 Johannes Czernin YR 2021 UL http://jnm.snmjournals.org/content/early/2021/07/08/jnumed.121.262860.abstract AB