TY - JOUR T1 - Comments and Perspectives JF - Journal of Nuclear Medicine JO - J Nucl Med SP - 1 LP - 1 VL - 46 IS - 1 AU - Henry N. Wagner, Jr Y1 - 2005/01/01 UR - http://jnm.snmjournals.org/content/46/1/1.abstract N2 - ER -