PT - JOURNAL ARTICLE ED - , TI - Chalk River Resumes; Other Isotope Producers Announce Shutdowns DP - 2014 Jan 01 TA - Journal of Nuclear Medicine PG - 9N--9N VI - 55 IP - 1 4099 - http://jnm.snmjournals.org/content/55/1/9N.short 4100 - http://jnm.snmjournals.org/content/55/1/9N.full SO - J Nucl Med2014 Jan 01; 55