[s9e4] Oral Report Today
S3–S9.e4 (The "S9E4" often refers to the page range or electronic supplement index used in academic databases)
2009 US Emergency Department HIV Testing Practices Journal: Annals of Emergency Medicine Volume/Issue: Volume 58, Issue 1, Supplement [S9E4] Oral Report
The specific paper associated with this citation is: by Rothman RE, Hsieh Y-H, Harvey L, et al. Paper Details S3–S9