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This issue of Clinics in Geriatric Medicine, guest edited by Seymour Katz, MD, is devoted to Gastroenterology. Articles in this outstanding issue include Constipation: Understanding Mechanisms and Management; Vaccination status/Prophylaxis with GI Diseases; Reflux and Acid Peptic Diseases in Elderly; Anorectal Physiology/Pathophysiology in Elderly; Endoscopic Challenges; Colorectal Cancer of Elderly; Pancreatic Disease; GI Drug Interactions; Microscopic/Collagenous Colitis; Hepatitis B and C; IBD of the Elderly; Imaging Techniques in GI Diseases of Elderly; Dysphagia/Swallowing disorders of...

For a number of years it has been a General Motors Research Laboratories custom to hold a symposium on a subject which is new and emerging, and to invite the best people in the world in that subject to come together to talk to each other. Initially, I had some difficulty in regarding foundry processes as a new and emerging subject. Copper alloys have been in foundry practice for about six thousand years. Foundrymen working with those alloys have been recognized, as such, for nearly all that time. Iron has a much shorter history, probably only three or four thousand years. So what's new? What...