1. Tetracaine from urethral ointment causes false positive amphetamine results by immunoassay. (3rd June 2021) Authors: Wijngaard, Robin; Parra-Robert, Marina; Marés, Lourdes; Escalante, Anna; Salgado, Emilio; González-de-la-Presa, Bernardino; To-Figueras, Jordi; Brunet, Mercè Journal: Clinical toxicology Issue: Volume 59:Number 6(2021) Page Start: 500 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗