1.Wiler, JL, Ross, MA, Ginde, AA. National Study of Emergency Department Observation Services. Academic Emergency Medicine 2011; 18:959–965.
2.Venkatesh, AK, Geisler, BP, Gibson Chambers, JJ, et al. Use of observation care in US emergency departments, 2001 to 2008. PLoS ONE 2011;6(9):e24326. Doi: 10.1371/journal.pone.0024326.
3.Baugh, CW, Venkatesh, AK, Bohan, JS. Emergency department observation units: a clinical and financial benefit for hospitals. Health Care Manage Rev 2011;36(1):28–37.