Expression of the tumor-associated carbonic anhydrase IX in primary liver and biliary cancers: Pietro Invernizzi, Marco Maggioni, Div Int Med, Univ of Milan, Milan Italy; Domenico Alvaro, Div Gastroenterol, Univ La Sapienza, Rome Italy; Gianfranco Alpini, Div Int Med & Med Physiol, The Texas A&M University System, Temple, TX; Luca Marucci, Div Gastroenterol, Univ of Ancona, Ancona Italy; Gene Lesage, Div Int Med & Med Physiol, The Texas A&M University System, Temple, TX; Antonio Benedetti, Div Gastroenterol, Univ of Ancona, Ancona Italy; Jaromír Pastorek, Ist of Virol, Acad of Sci, Bratislava Slovak Republic; Mauro Podda, Div Int Med, Univ of Milan, Milan Italy