title: Letter: Limitations of studies to evaluate the significance of anti-tumour necrosis factor serum levels in Crohn's disease.
authors.affiliation: Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IP), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain. mariachs2005@gmail.com.
authors.forename: M
authors.initials: M
authors.lastname: Chaparro
authors.forename: J P
authors.initials: JP
authors.lastname: Gisbert
mesh_terms: D000911:Antibodies, Monoclonal / Q000097:blood*; D002097:C-Reactive Protein / Q000378:metabolism*; D003424:Crohn Disease / Q000188:drug therapy*; D005260:Female; D005765:Gastrointestinal Agents / Q000097:blood*; D006801:Humans; D000069285:Infliximab; D008297:Male
chemical_list: D000911:Antibodies, Monoclonal; D005765:Gastrointestinal Agents; D002097:C-Reactive Protein; D000069285:Infliximab