APA (7th ed.) Citation

Groh, A., Janke, E., Schuster, R., Lichtinghagen, R., Frieling, H., & Hillemacher, T. (2017). GDNF serum levels are decreased in opioid-maintained patients. Heroin addiction and related clinical problems, 19(1), .

Chicago Style (17th ed.) Citation

Groh, Adrian, Eva Janke, Rilana Schuster, Ralf Lichtinghagen, Helge Frieling, and Thomas Hillemacher. "GDNF Serum Levels Are Decreased in Opioid-maintained Patients." Heroin Addiction and Related Clinical Problems 19, no. 1 (2017).

MLA (9th ed.) Citation

Groh, Adrian, et al. "GDNF Serum Levels Are Decreased in Opioid-maintained Patients." Heroin Addiction and Related Clinical Problems, vol. 19, no. 1, 2017.