RT Journal Article SR Electronic T1 The Authors' Reply JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 440 OP 440 VO 16 IS 5 A1 M. W. Billinghurst A1 R. F. Palser YR 1975 UL http://jnm.snmjournals.org/content/16/5/440.1.abstract AB