Make visible the invisible: innovative strategies for the future of global health - Claude Sicotte; Muriel Mac-Seing; Déborah Le Nogue; Cheick Oumar Bagayoko; Amy Sy; Jean-Luc Dumas; Willy Dunbar; Bernard Nordlinger; Jean-Paul de Gaudemar; Rachida Maouche; Antoine Flahault (BMJ Global Health)