Three years buy levofloxacin online The study on colonoscopies also looked at a less-thorough technique, known as a sigmoidoscopy, where a tube is only inserted into the end of the large intestine. A colonoscopy examines the full length. The information on 88,902 people, followed over 22 years, came from two databases: the Nurses’ Health Study and the Health Professionals Follow-up Study.
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