Catherine Lassale, doctor of medicine, pediatrician, had extensive hospital experience (former Paris Hospital Intern and former Head of Clinic Assistant) and institutional experience (Director of a social security monitoring center for children) before starting her career in the pharmaceutical industry, first in research and development as medical and regulatory director in charge of the Transparency dossiers at Sanofi.​

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In 2001, she joined the Leem (trade association representing pharmaceutical companies operating in France) as Director of Scientific Affairs representing the industry to the Transparency Commission. She was a member of Leem until November 2015.​

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