Another story from the prestigious medical journal, "Duh". A new US study published in the New England Journal of Medicine says that doctors who took their time when giving a colonoscopy found more cancerous and pre-cancerous tumors than those that rushed through the procedure. Doctors Who Take More Time With Colonoscopy Find More Tumours - Medical News Today / Hurried colon exams miss polyps, study finds - The Boston Globe (boston.com)