Social pain. Comment on 'Environmental factors and their impact on chronic pain development and maintenance' by Morena Brazil Sant'Anna, Louise Faggionato Kimura, Willians Fernando Vieira, Vanessa Olzon Zambelli, Leonardo Santana Novaes, Natália Gabriele Hösch, Gisele Picolo.

Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.