Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Randomized, Placebo Controlled, Double Blind, Parallel Group Multi-Center Study In Order To Investigate Safety And Efficacy Of CP- 690 550 In Subjects With Moderate To Severe Ulcerative Colitis.
Brief Summary: The hypothesis of the study is that at least one dose of CP 690 550 is superior to placebo (inactive drug) in inducing remission in patients with moderate to severe ulcerative colitis.


Options:
A: Inclusion Criteria:

* Patients must be at least 18 years of age at screening
* Males and female patients with clinical diagnosis of ulcerative colitis ≥3 months prior to entry into the study.
* Male and female patients with active currently moderate to severe ulcerative colitis defined by Mayo score of ≥6
* Patients with endoscopic sub-score of ≥2 on the Mayo score determined within 7 days of baseline.

Exclusion Criteria:

* Diagnosis of Crohn's disease or diagnosis of indeterminate colitis
* Treatment naive subjects who have not had previous exposure to treatment for ulcerative colitis
* Patients that are currently receiving immunosuppressants, anti-TNFα therapy or interferon
B: Inclusion Criteria:

* Patients must have had ulcerative colitis of at least 3 months' duration at screening, confirmed by the biopsy taken at screening
* Patients must have active colitis confirmed during the screening sigmoidoscopy
* Patients must have active disease.

Exclusion Criteria:

* Patient must not be likely to require surgical removal of all or part of the colon within 12 weeks of beginning the study
* Patient must not require, or required within the 2 months prior to beginning the study, surgery for active gastrointestinal bleeding, peritonitis, intestinal obstruction, or intra-abdominal or pancreatic abscess requiring surgical drainage
C: Inclusion Criteria:

* Patients fulfilling the following criteria at the screening visit are eligible for participation in the study:

  * Male and female patients, 18-75 years old, suffering from ulcerative colitis for at least 6 months.
  * Diagnosis of ulcerative colitis in active phase, of mild or moderate entity with Ulcerative Colitis Disease Activity Index (UCDAI) ≥ 4 and ≤ 10 according to Sutherland.
  * All females of child-bearing potential must have a negative serum pregnancy test immediately prior to enrollment. In addition, all females of child-bearing potential must agree to be completely abstinent or be using an accepted form of contraception throughout the entire study period. Accepted forms of contraception are defined as those with a failure rate \<1% when properly applied and include: combination oral pill, some intra-uterine devices, and a sterilised partner in a stable relationship. Female subjects must also not be actively breast-feeding through the entire study period.
  * Ability to comprehend the full nature and purpose of the study, including possible risks and side effects.
  * Ability to co-operate with the investigator and to comply with the requirements of the entire study.
  * Must be able to understand and voluntarily sign written informed consent prior to inclusion in the study.

Exclusion Criteria:

* Patients who meet any of the following criteria at screening visit are to be excluded from study participation:

  * Patients with limited distal proctitis (from anal verge up to 15 cm above the pectineal line).
  * Patients with severe ulcerative colitis (UCDAI \>10).
  * Patients with infectious colitis.
  * Evidence or history of toxic megacolon.
  * Severe anaemia, leucopaenia or granulocytopaenia.
  * Use of oral or rectal steroids in the last 4 weeks.
  * Use of immuno-suppressive agents in the last 8 weeks before the study.
  * Use of anti tumour necrosis factor alpha (anti-TNFα) agents in the last 3 months.
  * Concomitant use of any rectal preparation.
  * Concomitant use of antibiotics.
  * Concurrent use of cytochrome P450 3A4 (CYP3A4) inducers or CYP3A4 inhibitors.
  * Patients with verified, presumed or expected pregnancy or ongoing lactation.
  * Patients with liver cirrhosis, or evident hepatic or renal disease or insufficiency, and/or severe impairment of the bio-humoural parameters (i.e. 2 x upper limit of normal for alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transpeptidase (GGT) or creatinine).
  * Patient with severe diseases in other organs and systems.
  * Patients with local or systemic complications or other pathological states requiring a therapy with corticosteroids and/or immuno-suppressive agents.
  * Patients diagnosed with type 1 diabetes.
  * Patients diagnosed with, or with a family history of, glaucoma.
  * All patients with known hepatitis B, hepatitis C or with human immunodeficiency virus (HIV), according to the local privacy policy.
  * Participation in experimental therapeutic studies in the last 3 months. (Note: patients who participated in observational only studies are not excluded).
  * Any other medical condition that in the principal investigator's opinion would make the administration of the study drug or study procedures hazardous to the subject or obscure the interpretation of adverse events (AEs).
D: Inclusion Criteria:

* A positive histological diagnosis of UC ≥3 months prior to entry into the study. If a histological diagnosis is not available but all signs and symptoms suggest UC, the subject's eligibility should be discussed with Pfizer.
* Active UC as defined by a score of ≥6 on the Mayo score.
* An endoscopic (by flexible sigmoidoscopy) sub-score of ≥2 on the Mayo score determined within 7 days of first dosing.

Exclusion Criteria:

* Subjects with UC, which is confined to a proctitis on a flexible sigmoidoscopy.
* Subjects who have had surgery as a treatment for UC or are likely to require surgery within the duration of the study.
* Subjects displaying clinical signs of ischemic colitis.

Answer: A