[\'Hiroshima High-Precision Radiotherapy Cancer Center, Hiroshima, 732-0057, Japan.\', \'Department of Radiation Oncology, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, 739-8511, Japan.\']
Uncertainty in the positioning of patients receiving treatment for brain metastases and wearing surgical mask underneath thermoplastic mask during COVID-19 crisis.