Case-control studies conducted in emergency departments: a methodological consideration

Soheil Saadat, Department of Emergency Medicine, University of California, Irvine, California, U.S.A.
Bharath Chakravarthy, Department of Emergency Medicine, University of California, Irvine, California, U.S.A.
Shahram Lotfipour, Department of Emergency Medicine, University of California, Irvine, California, U.S.A.
Eric McCoy, Department of Emergency Medicine, University of California, Irvine, California, U.S.A.