Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Cluster Randomized Controlled Trial of a Treatment Algorithm for the Management of Crohn's Disease
Brief Summary: Assess if the implementation of a treatment algorithm will improve the management of Crohn's disease (CD) in comparison to usual care based gastroenterology practices.


Options:
A: 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
B: Inclusion Criteria:

* Documented diagnosis of Crohn's disease
* Able to speak and understand English, French or Flemish
* Access to a telephone or email/internet service
* Written informed consent must be obtained and documented

Exclusion Criteria:

* Any conditions (e.g., history of alcohol or substance abuse) which in the opinion of the investigator , may interfere with the patients ability to comply with study procedures
* Participating in other investigational studies
C: Inclusion Criteria:

NOR-DRUM A

1. A clinical diagnosis of one of the following; rheumatoid arthritis, spondyloarthritis (including ankylosing spondylitis), psoriatic arthritis\*, ulcerative colitis, Crohn's disease or chronic plaque psoriasis
2. Male or non-pregnant female
3. ≥18 and \< 75 years of age at screening
4. A clinical indication to start INX
5. Subject not in remission according to diagnosis-specific disease activity scores
6. Subject capable of understanding and signing an informed consent form

   * Patients with psoriatic arthritis with predominantly axial manifestations should be included and assessed as spondyloarthritis

NOR-DRUM B

1. A clinical diagnosis of one of the following; rheumatoid arthritis, spondyloarthritis (including ankylosing spondylitis), psoriatic arthritis\*, ulcerative colitis, Crohn's disease or chronic plaque psoriasis
2. Male or non-pregnant female
3. ≥18 and \< 75 years of age at screening
4. On maintenance therapy with infliximab for a minimum of 30 weeks and a maximum of 3 years
5. A clinical indication for further infliximab treatment
6. Subject capable of understanding and signing an informed consent form

   * Patients with psoriatic arthritis and predominantly axial manifestations should be included and assessed as spondyloarthritis

Exclusion Criteria:

NOR-DRUM A

1. Major co-morbidities, such as previous malignancies within the last 5 years, severe diabetes mellitus, severe infections (including HIV), uncontrollable hypertension, severe cardiovascular disease (NYHA class 3 or 4), severe respiratory diseases, demyelinating disease, significant chronic widespread pain syndrome, laboratory abnormalities or significant renal or hepatic disease and/or other diseases or conditions where treatment with infliximab is either found contra-indicated by the clinician or which make adherence to the protocol difficult
2. A positive screening for TB and hepatitis
3. Inadequate birth control, pregnancy or subject considering becoming pregnant during the study period
4. Psychiatric or mental disorders, alcohol abuse or other substance abuse, language barriers or other factors which makes adherence to the study protocol difficult
5. Prior use of infliximab within the last 6 months

NOR-DRUM B

1. Major co-morbidities, such as previous malignancies within the last 5 years, severe diabetes mellitus, severe infections, uncontrollable hypertension, severe cardiovascular disease (NYHA class 3 or 4), severe respiratory diseases, demyelinating disease, significant chronic widespread pain syndrome, laboratory abnormalities or significant renal or hepatic disease and/or other diseases or conditions where treatment with infliximab is either found contra-indicated by the clinician or which make adherence to the protocol difficult
2. Inadequate birth control, pregnancy or subject considering becoming pregnant during the study period
3. Psychiatric or mental disorders, alcohol abuse or other substance abuse, language barriers or other factors which makes adherence to the study protocol difficult
D: Inclusion Criteria:

* Male or female patients with active Crohn's disease and a Crohn's disease activity index score between 220 and 450 points

Exclusion Criteria:

* Patient who has previously received a biological agent for the treatment of Crohn's disease and/or a Tumor necrosis factor (TNF)-alpha inhibitor for the treatment of other disease.
* Patient who has allergies to any of the excipients of infliximab, any other murine and/or human proteins, or patient with a hypersensitivity to immunoglobulin product.

Answer: B