1. Emergency department crowding, part 1–concept, causes, and moral consequences;Moskop;Ann Emerg Med,2009
2. D-to-D slashed 85% in seven weeks;Sayah;ED Management,2009
3. US emergency department performance on wait time and length of visit;Horwitz;Ann Emerg Med,2009
4. Optimizing emergency department front-end operations;Wiler;Ann Emerg Med,2010
5. Experimental and quasi-experimental designs for generalized causal inference;Shadish,2002