POSTSURGICAL FOLLOW-UP OF CROHNS-DISEASE BY FECAL EXCRETION OF IN-111 LABELED LEUKOCYTES - HELLIN, D; ABASCAL, J; PARDO, F; ABREU, L; MUNOZ, C; CHANTAR, C; GALVAN, FR; CHAMORRO, JL (DIGESTIVE DISEASES AND SCIENCES, 1986)