Please select the eligibility criteria that correspond to the clinical trial below.
Title: The Ideal Management of Crohn's Disease: Top Down Versus Step Up Strategies. A Prospective Controlled Trial in the Benelux
Brief Summary: The study prospectively compares two treatment algorithms for newly diagnosed Crohn's disease: one 'aggressive' treatment with early introduction of immunomodulators and biologicals and one 'standard treatment' with corticosteroids and only later introduction of immunosuppressives and biologicals if disease activity requires that.


Options:
A: Inclusion Criteria:

* Diagnosis of CD or UC based on endoscopy and pathology
* 18 years or older
* Clinical remission, based on a Harvey Bradshaw Index (HBI) score ≤4 or a Partial Mayo (PM) score ≤2, for CD and UC
* Scheduled IFX maintenance treatment, regardless of interval/dosing

Exclusion Criteria:

- Dilatation or resectional surgery because of stenotic IBD in the past year
B: Inclusion Criteria:

1. Patient must be able to understand the information given to him/her and give written informed consent.
2. Definitive diagnosis of Crohn's disease (confirmed by recent radiological, endoscopic and/or histological evidence according to international criteria) .
3. Age minimum 18 years.
4. Previous good response to at least 3 doses (5mg/kg) of infliximab (as judged by the treating physician).
5. Loss of response to standard doses of infliximab (as judged by the treating physician).
6. Last infliximab infusion given at least 4 weeks before inclusion.
7. For patients with luminal disease, the CDAI should be above 220 points at inclusion.
8. For patients with fistulising disease only, at least one draining perianal fistula (confirmed by radiography, MR, ultrasound or physical examination) should be present.

Exclusion Criteria:

1. Any contraindication to continued infliximab treatment
2. Short bowel syndrome
3. Bowel resection within 12 weeks of inclusion.
4. Current or recent history of severe, progressive, and/or uncontrolled renal, hepatic, haematological, gastrointestinal, endocrine, pulmonary, cardiac, neurological, or cerebral disease.
5. Pregnancy
6. History of alcohol or drug abuse within the prior year
7. Patients who do not meet concomitant medication criteria.
8. Any other condition, which in the Investigator's judgment would make the patient unsuitable for inclusion in the study.
C: Inclusion Criteria:

* Have a documented diagnosis of CD confirmed by endoscopic, histologic and/or radiologic studies prior to resection or by tissue obtained at resection
* Have undergone an ileocolonic surgical resection
* Patients must also be at an increased risk of recurrence of active CD
* Patients must not have previously discontinued infliximab as a result of tolerability issues or they must be naive to treatment with infliximab. Provided patients meet the above criteria pertaining to infliximab, they are eligible to enroll if they received prior treatment with adalimumab and/or certolizumab
* Patients must undergo screening for HBV
* Baseline CDAI \< 200
* Have adequate blood and liver test values

Exclusion Criteria:

* Have a history of latent or active granulomatous infection, including histoplasmosis or coccidioidomycosis, prior to screening
* Have a chest radiograph within 3 months prior to the first infusion of study agent that shows a clinically significant abnormality, such as a malignancy or infection, or any abnormalities suggestive of TB
* Have macroscopically active CD which was not resected at the time of surgery
* Do not meet the criteria for being at an increased risk of postoperative recurrence of active CD as outlined in the inclusion criteria
* Have evidence of an active infection at the time of randomization or have had a serious infection not related to CD (e.g., hepatitis, pneumonia, or pyelonephritis), within 6 months prior to screening
* Have or have had an opportunistic infection (e.g., herpes zoster \[shingles\], cytomegalovirus, Pneumocystis carinii, aspergillosis, histoplasmosis, or mycobacteria other than TB) within 6 months prior to screening
* Have any known malignancy or history of malignancy within the 5-year period prior to screening (with the exception of squamous or basal cell carcinoma of the skin that has been completely excised without evidence of recurrence)
* Have any condition that, in the opinion of the investigator, would compromise the well-being of the patient or the study or prevent the patient from meeting or performing study requirements.
D: Inclusion Criteria:

* age 16 - 75 years
* diagnosis of Crohn's disease within the past 4 years
* no previous treatment with corticosteroids, antimetabolites, or biologic agents.
* Active Crohn's disease, defined by a Crohn's Disease Activity Index (CDAI)20 score of greater than 200 points for a minimum of 2 weeks prior to randomization.

Exclusion Criteria:

* immediate need for surgery
* symptomatic stenosis or ileal/colonic strictures with prestenotic dilatation;
* signs, symptoms or laboratory tests indicating severe, medical disease;
* documented chronic infection
* a positive stool culture for pathogens
* a positive tuberculin test or a chest radiograph consistent with tuberculosis.
* malignancy
* allergy to murine proteins
* pregnancy
* substance abuse

Answer: D