PT - JOURNAL ARTICLE ED - Society of Nuclear Medicine TI - Calendar DP - 1977 Mar 01 TA - Journal of Nuclear Medicine PG - 324--326 VI - 18 IP - 3 4099 - http://jnm.snmjournals.org/content/18/3/324.short 4100 - http://jnm.snmjournals.org/content/18/3/324.full SO - J Nucl Med1977 Mar 01; 18