1. National Center for Health Statistics National Hospital Ambulatory Medical Care Survey, 2010 Emergency Department Summary Tables: Table 10, Ten Leading Principal Reasons for Emergency Department Visits, by Patient Age and Sex www.cdc.gov/nchs/data/ahcd/nhamcs_emergency/2010_ed_web_tables.pdf
2. National Center for Health Statistics National Hospital Ambulatory Medical Care Survey, 2010 Emergency Department Summary Tables: Table 13. Twenty Leading Primary Diagnosis Groups for Emergency Department Visits, by Patient Age and Sex: United States, 2010 www.cdc.gov/nchs/data/ahcd/nhamcs_emergency/2010_ed_web_tables.pdf
3. Variation in emergency department admission rates across the United States;Pines;Med Care Res Rev,2013
4. Emergency department physician-level and hospital-level variation in admission rates;Abualenain;Ann Emerg Med,2013
5. Evidence-based standardization and ED admission rate variation in US children's hospitals;Pines;Pediatrics,2014