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Background
OnabotulinumtoxinA (BoNTA) demonstrated a positive benefit‐risk in chronic migraine (CM) patients in PREEMPT I and II phase III trials and many subsequent real‐world studies. We herein aimed at evaluating the adherence to repeated BoNTA over a period of five years, while secondary objectives included the assessment of its long‐term safety/efficacy and patients’ satisfaction to treatment...
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