Correction: Effectiveness of a scalable, remotely delivered stepped-care intervention to reduce symptoms of psychological distress among Polish migrant workers in the Netherlands:... oleh Rinske Roos, Anke B Witteveen, José Luis Ayuso-Mateos, Corrado Barbui, Richard A. Bryant, Mireia Felez-Nobrega, Natasha Figueiredo, Rafael Kalisch, Josep Maria Haro, David McDaid, Roberto Mediavilla, Maria Melchior, Pablo Nicaise, A-La Park, Papoula Petri-Romão, Marianna Purgato, Annemieke van Straten, Federico Tedeschi, James Underhill, Marit Sijbrandij, on behalf of the RESPOND Consortium