Systematic Reviews
Copyright ©The Author(s) 2021.
World J Clin Cases. May 16, 2021; 9(14): 3294-3307
Published online May 16, 2021. doi: 10.12998/wjcc.v9.i14.3294
Figure 1
Figure 1 Flow chart of selection of 124 papers found in the literature. CH: Cluster headache; CLH: Cluster-like headache.