RT Journal Article SR Electronic T1 Marijuana unsafe for pregnant women, surgeon general advises — Clinicians urged to ask about use JF The Nation's Health JO Nations Health FD American Public Health Association SP 7 OP 7 VO 49 IS 9 A1 Aaron Warnick YR 2019 UL http://www.thenationshealth.org/content/49/9/7.1.abstract AB