Shayegani, R. ., Song, K. ., Amuan, M. ., Jaramillo, C. ., Eapen, B. ., & Pugh, M. . Patterns of zolpidem use among Iraq and Afghanistan veterans: A retrospective cohort analysis. PloS One, 13(1), e0190022. https://doi.org/10.1371/journal.pone.0190022 (Original work published 2018)