Occurrence of Z-drugs, benzodiazepines, and ketamine in wastewater in the United States and Mexico during the Covid-19 pandemic

Sangeet Adhikari, Rahul Kumar, Erin M. Driver, Devin A. Bowes, Keng Tiong Ng, Juan Eduardo Sosa-Hernandez, Mariel Araceli Oyervides-Muñoz, Elda M. Melchor-Martínez, Manuel Martínez-Ruiz, Karina G. Coronado-Apodaca, Ted Smith, Aruni Bhatnagar, Brian J. Piper, Kenneth L. McCall, Roberto Parra-Saldivar, Leon P. Barron, Rolf U. Halden