APA (7th ed.) Citation

Nicholas, M., & Treede, R. (2019). The IASP classification of chronic pain for ICD-11 - chronic primary pain. Pain, 160(1), . https://doi.org/10.1097/j.pain.0000000000001390

Chicago Style (17th ed.) Citation

Nicholas, Michael, and Rolf-Detlef Treede. "The IASP Classification of Chronic Pain for ICD-11 - Chronic Primary Pain." Pain 160, no. 1 (2019). https://doi.org/10.1097/j.pain.0000000000001390.

MLA (9th ed.) Citation

Nicholas, Michael, and Rolf-Detlef Treede. "The IASP Classification of Chronic Pain for ICD-11 - Chronic Primary Pain." Pain, vol. 160, no. 1, 2019, https://doi.org/10.1097/j.pain.0000000000001390.