RT Journal Article SR Electronic T1 Observer Variability: What to do Until Perfect Diagnostic Tests are Invented JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 435 OP 437 VO 19 IS 4 A1 Turner, David A. YR 1978 UL http://jnm.snmjournals.org/content/19/4/435.abstract AB