TY - GEN AU - BONADIES,A TI - [Precancerous lesions of the gastrointestinal system; clinical aspects] SN - 0035-6255 PY - 2002///0501 KW - Digestive System Neoplasms KW - Gastrointestinal Tract KW - Humans KW - Neoplasms N1 - Publication Type: Journal Article ER -