Commentary: Systemic, Local, and Imaging Biomarkers of Brain Injury: More Needed, and Better Use of Those Already Established? - de Lima Oliveira, Marcelo; Bor-Seng-Shu, Edson; Simm, Renata Faria; Vilas Boas, Tatiana; Pires Aguiar, Paulo Henrique (Frontiers in Neurology, 2016)