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Pohl H, Do TP, García-Azorín D, et al. Green Flags and headache: A concept study using the Delphi method. Headache. 2021;61(2):300-309doi: 10.1111/head.14054.
Pohl, H., Do, T. P., García-Azorín, D., Hansen, J. M., Kristoffersen, E. S., Nelson, S. E., Obermann, M., Sandor, P. S., Schankin, C. J., Schytz, H. W., Sinclair, A., Schoonman, G. G., & Gantenbein, A. R. (2021). Green Flags and headache: A concept study using the Delphi method. Headache, 61(2), 300-309. https://doi.org/10.1111/head.14054
Pohl, Heiko, et al. "Green Flags and headache: A concept study using the Delphi method." Headache vol. 61,2 (2021): 300-309. doi: https://doi.org/10.1111/head.14054
Pohl H, Do TP, García-Azorín D, Hansen JM, Kristoffersen ES, Nelson SE, Obermann M, Sandor PS, Schankin CJ, Schytz HW, Sinclair A, Schoonman GG, Gantenbein AR. Green Flags and headache: A concept study using the Delphi method. Headache. 2021 Feb;61(2):300-309. doi: 10.1111/head.14054. Epub 2021 Jan 06. PMID: 33405273.
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