Author Correction: Considerations in the search for epistasis - Marleen Balvert; Johnathan Cooper-Knock; Julian Stamp; Ross P. Byrne; Soufane Mourragui; Juami van Gils; Stefania Benonisdottir; Johannes Schlüter; Kevin Kenna; Sanne Abeln; Alfredo Iacoangeli; Joséphine T. Daub; et al. (Genome Biology)