TMA syndromes are serious, immediately life-threatening pathologies, so a last resort network operating 24/7 has been set up. It offers a direct telephone line (+33 1 49 28 32 60) and the reception desk of the Saint-Antoine site (+33 1 49 28 20 00, ext. 85069 or 80273), a mobile line (+33 6 18 04 43 96) and an e-mail (paul.coppo@aphp.fr or elise.corre@aphp.fr).