Correction
Correction for: Walter U, Mühlenhoff C, Benecke R, Dressler D, Mix E, Alt J, Wittstock M, Dudesek A, Storch A, Kamm C. Frequency and risk factors of antibody-induced secondary failure of botulinum neurotoxin therapy. Neurology. 2020 ;94(20):e2109-e2120. doi: 10.1212/WNL.0000000000009444. PMID: 32332130