About the Authors

Hime Suzuki

Roles Data curation

Affiliation Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan

Nobuhiro Mikuni

Roles Conceptualization, Data curation, Investigation, Writing – original draft, Writing – review & editing

mikunin@sapmed.ac.jp

Affiliation Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan

Hirofumi Ohnishi

Roles Formal analysis

Affiliation Department of Public Health, Sapporo Medical University, Sapporo, Japan

Rintaro Yokoyama

Roles Data curation

Affiliation Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan

Rei Enatsu

Roles Data curation

Affiliation Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan

Satoko Ochi

Roles Data curation

Affiliation Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan

Competing Interests

Nobuhiro Mikuni has received speaker's honoraria from Eisai, UCB, Otsuka, and Daiichi Sankyo. This does not alter our adherence to PLOS ONE policies on sharing data and materials.