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Table 3 Number of previously failed medications for each patient

From: Intravenous ketamine for subacute treatment of refractory chronic migraine: a case series

Patient 1 2 3 4 5 6
Abortive Medications Failed 19 NA 16 14 18 26
Preventive Medications Failed 25 5 17 28 23 29
OnabotulinumtoxinA Failed Yes NA Yes Yes Yes Yes
  1. NA not available