RT Journal Article SR Electronic T1 Medical Radioisotopes—What Steps Can We Take to Ensure a Secure Supply? JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 17N OP 18N VO 50 IS 4 A1 Atcher, Robert W. YR 2009 UL http://jnm.snmjournals.org/content/50/4/17N.abstract AB