TY - GEN AU - Arnott,I D R AU - Satsangi,J TI - Crohn's disease or Crohn's diseases? SN - 0017-5749 PY - 2003///0529 KW - Crohn Disease KW - classification KW - Disease Progression KW - Genotype KW - Humans KW - Phenotype KW - Risk Factors N1 - Publication Type: Comment; Journal Article UR - https://doi.org/10.1136/gut.52.4.460 ER -