Corrigendum: Amino Acids in Cerebrospinal Fluid of Patients With Aneurysmal Subarachnoid Haemorrhage: An Observational Study - Bartosz Sokół; Bartosz Urbaniak; Norbert Wąsik; Szymon Plewa; Agnieszka Klupczyńska; Roman Jankowski; Barbara Więckowska; Robert Juszkat; Zenon Kokot (Frontiers in Neurology, 2018)