Liu, H., Ran, Y., Dang, L., Yang, R., Sun, S., Zhang, M. ., Li, K., Chen, C., Dong, Z., & Yu, S. (2021). Clinical features and outcomes of new daily persistent headache in patients in China and comparison with medication overuse headache: a double-center retrospective study. Pain Medicine, 6(1), 10–20. https://doi.org/10.31636/pmjua.v6i1.2