It became such a renowned centre of instruction and improvement for all physicians and surgeons who passed it that it was decided to admit into active formation the newly-arrived Americans. René Leriche found several great names in medicine: the brilliant specialist in thoracic surgery Jean-Louis Roux-Berger (well ahead of what was done elsewhere), Lemaître who will remain the creator of the primitive suture of the wounds, the neurologist Georges Guillain, Lyon radiologist Thomas Nogier and pathologist Pierre Masson. However, he had the support for assistant Paul Santy and convert for his department of fractures and joint lesions.