RT Journal Article SR Electronic T1 E. coli in produce shows need for better tracking, prevention: Romaine lettuce outbreaks spur action JF The Nation's Health JO Nations Health FD American Public Health Association SP 1 OP 18 VO 49 IS 1 A1 Mark Barna YR 2019 UL http://www.thenationshealth.org/content/49/1/1.1.abstract AB