Correction: Human Direct Actions May Alter Animal Welfare, a Study on Horses (Equus caballus)

The following paragraph in the Methods subsection "Horses' spine examination" should read as follows: "In order to ensure the repeatability of these findings, evaluation was double performed by a second licensed chiropractor, equally blind to results and unknown to horses, on 10 out of the 19 horses. Comparison of evaluations (localisation of vertebral sites affected) revealed a 94.28% ± 3.69% agreement, therefore confirming reliability of the evaluation."