@article{1305556, author = {Karli Hochstatter and Talia Nadel and Edward Sisco and Sarah Laurel and Tori McDowell and Elise Pyfrom and Meghan Appley and Fernando Montero}, title = {Characterizing rapid changes in the prevalence and concentration of key compounds in Philadelphia's fentanyl supply, March-November 2024}, year = {2025}, number = {274}, month = {2025-06-22 04:06:00}, publisher = {Drug and Alcohol Dependence}, url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=959361}, doi = {https://doi.org/10.1016/j.drugalcdep.2025.112763}, language = {en}, }