refs: confirm Zink2009ohbm; it is a citable abstract with a DOI

The NeuroImage PDF that appeared to disprove this entry is the OHBM
2009 *Scientific Program* (47:S6-S32) -- schedule only: workshops,
receptions, session titles. It contains no individual abstracts at all
(zero hits for Zink, Hakimi, vasopressin or Meyer-Lindenberg), so its
silence was not evidence.

The abstracts are separately deposited with their own DOIs. This one is
NeuroImage 47:S184, doi 10.1016/S1053-8119(09)72042-7, and matches the
bib exactly: same title, same six authors in the same order (C.F. Zink,
L. Kempf, S. Hakimi, C.A. Rainey, J.L. Stein, A. Meyer-Lindenberg).
That independently re-confirms the Kempf "L." and Stein "J. L." forms
corrected earlier today.

Recorded the DOI, so audit_authors.py now covers this entry too, and
added type. No OHBM 2010 equivalent exists -- those abstracts were not
deposited to Crossref, which is why Tost2010ohbm could only be verified
against OHBM's own listing PDF.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: shabtastic

refs/presentations.bib

@@ -717,8 +717,11 @@ @unpublished{Zink2009ohbm
   title    = {Effects of vasopressin on {mPFC}-amygdala circuitry during fearful face processing in humans},
   year     = {2009},
   month    = jun,
-  note     = {Presented at the Annual Meeting of the Organization for Human Brain Mapping, San Francisco, CA},
-  keywords = {presentation},
+  note     = {Presented at the Annual Meeting of the Organization for Human
+              Brain Mapping, San Francisco, CA. {NeuroImage} 47:S184},
+  doi      = {10.1016/S1053-8119(09)72042-7},
+  type     = {Poster},
+  keywords = {manual, presentation},
   part_of  = {neuropeptide-social},
   finding  = {zink2009-vasopressin-mpfc},
 }