Testosterone levels in men with chronic migraine

Contributions: LS made substantial contributions to the conception and design, analyzed and interpreted the data, performed the literature search, and was the major contributor in the writing of the manuscript. TS and BP made substantial contributions to the conception and design, analyzed and interpreted the data, and revised the draft critically for important intellectual content. BS is the statistician who performed the statistical analysis in this work and also contributed to the conception and design, analyzed and interpreted the data, and revised the draft critically for important intellectual content