TY - JOUR T1 - Comments and Perspectives JF - Journal of Nuclear Medicine JO - J Nucl Med SP - 1273 LP - 1273 VL - 45 IS - 8 AU - Heinrich R. Schelbert Y1 - 2004/08/01 UR - http://jnm.snmjournals.org/content/45/8/1273.abstract N2 - ER -