I always regret that in the history of study of the neuromesodermal and mesendodermal progenitors evoked in various introductions, the careful experimental embryology executed by Dr Marie-Aimée Teillet with her MD/PhD student, Jean-Baptiste Charrier, has gone unrecognized after the idea had been further developed by the group of another productive Le Douarin lab alumnus, Olivier Pourquié. I recommend reading the original 1999 work and a few papers on the theme in the early 2000s, and considering adding credit for the concept where it is still due: https://pubmed.ncbi.nlm.nih.gov/10518494/