TY - BOOK ED - United States. TI - Carfentanil: a dangerous new factor in the U.S. opioid crisis T2 - Office safety alert PY - 2016///?] CY - [Washington, D.C.] PB - Drug Enforcement Administration KW - Synthetic drugs KW - United States KW - Fentanyl KW - Opioid abuse KW - Drug abuse N1 - CRDP Program record UR - https://purl.fdlp.gov/GPO/gpo107901 ER -