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Table 2 Clinical characteristics of patients with NDPH in various published studies

From: New daily persistent headache: a systematic review on an enigmatic disorder

  1. a[1]
  2. b[8]
  3. c[10]
  4. d[11]
  5. e[13]
  6. f[15]
  7. g[20]
  8. h[16]
  9. i[19]