" Inter-Rater Reliability of Historical Data Collected by Non-Medical Research Assistants and Physicians in Patients with Acute Abdominal Pain " Mills, Angela M.; Dean, Anthony J.; Shofer, Frances S.; Hollander, Judd E.; McCusker, Christine M.; Keutmann, Michael K.; Chen, Esther H.; <a href="" class="c-authorlist__list-more-link">et al.</a>