The article was published with a CC licence compatible with CC By 4.0. The text says: "This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited."

Extracted from the article: "Louis-Alexandre Romaña has granted permission for the reuse of the photographs that he owns and that he has provided (Figs 1 and 3) and for his letter. Written permission is included as Supporting information.

Dr. Faustino TORRICO has granted permission for the reuse of the photograph that he owns and that he has provided (Fig 2)."

The article has three authors, Beucler N, Torrico F and Hibbert D