Anchor: Studies should, therefore, use a variety of databases, including not only emergency department records, but also general medical record reviews and insurance and Medicare/Medicaid claims to detect outpatient visits.
Entailed: It is imperative to detail outpatient visits via a variety of records. 
Contradiction: Using more than one database to track outpatient visits is unnecessary. 
Contradiction: The grade school is fighting outside.
Contradiction: The professor and the students are all indoors.
Contradiction: A lab worker is reading a chart off the computer.
Contradiction: the kid is laughing in the tent