Which of the following BEST summaries the significance of Researches on the Effects of Bloodletting in Some Inflammatory Diseases by Pierre Louis (1787-1872)? Group of answer choices Louis demonstrated that doctors had the tools at their disposal to cure most of the ailments they encountered in patients. Louis was the last major advocate for bloodletting as a therapy. Louis effectively used a form of clinical trial to evaluate different therapies: He divided similar patients into groups and compared the results of various treatments.