Erratum to 'Adverse events in a chiropractic spinal manipulative therapy single-blinded, placebo, randomized controlled trial for migraineurs' [Musculoskeletal. Ther. and Pract. 29C (2017) 66–71]. (October 2017) - Chaibi, Aleksander; Benth, Jūratė Šaltytė; Tuchin, Peter J.; Russell, Michael Bjørn