For the next year and a half he studied in Paris, particularly under Baron Guillaume Dupuytren and Pierre Charles Alexandre Louis.
Gavarret is remembered for the systemization and expansion of Pierre Charles Alexandre Louis' (1787-1872) statistical methodology in regards to medicine.
Hooker attributed it to the Parisian pathologist and clinician Auguste François Chomel (1788–1858), the successor of Laennec in the chair of medical pathology, and the preceptor of Pierre Louis.
It is named after Pierre Charles Alexandre Louis, a French physician of the 19th century, who was one of the first to bring mathematics to medicine, disproving bloodletting as a practice by showing statistically that it did not work.
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