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Panel 9 Index: a. Backcountry Drinking [Comparison of filters, boiling and iodine] Alan Dove, Bill Tuthill 1996 Filters: First Need, Katadyn, MSR, PUR Boiling, Iodine: PolarPure, Potable-Aqua b. GIARDIASIS Memo from Center from Disease Control Dennis D. Juranek Chief, Epidemiology Activity Parasitic Diseases Branch Division of Parasitic