TY  - GEN
AU  - Fraser,F C
TI  - Follow-up time bias and Crohn's disease
SN  - 0140-6736
PY  - 1996///0819
KW  - Adult
KW  - Age of Onset
KW  - Child
KW  - Crohn Disease
KW  - epidemiology
KW  - Female
KW  - Genetic Predisposition to Disease
KW  - Humans
KW  - Male
KW  - Trinucleotide Repeats
N1  - Publication Type: Comment; Letter
ER  -