Studies have found concerning contamination rates including incorrect amino acid sequences in 30% of tested products and endotoxin levels exceeding safe thresholds in 65% of samples
DFG TI239/16-1 (PI Timmann)) Ethics declarations Conflicts of Interest LN Miterko, J Beckinghausen, RV Sillitoe: None LV Bradnam, AB McCambridge: None J Cooperrider, KB Baker, A Machado: None M Hallett: Member of the scientific advisory board of Brainsway T Popa: None DH Heck: None T Wichmann, MR DeLong: None SV Gornati, FE Hoebeek: None AZ Kouzani: None S-H Kuo, T Xie, ED Louis: None M Manto, N Oulad Ben Taib: None MA Nitsche: Member of the scientific advisory board of Neuroelectrics M Tanaka: None D Timmann: None MY Cheng, EH Wang, GK Steinberg: None Additional information Publishers Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations
Positive staining for ferritin was observed in glial cells and distorted neurites (axons and dendrites)
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