Please select the eligibility criteria that correspond to the clinical trial below.
Title: Phase 3 Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study Of The Efficacy And Safety Of 2 Oral Doses Of CP-690,550 In Subjects With Moderate To Severe Chronic Plaque Psoriasis
Brief Summary: The main objective of this study is to compare the effects of CP-690,550 with the effects of placebo in patients being treated for moderate to severe chronic plaque psoriasis. This one-year study will also evaluate the safety and tolerability of CP-690,550 versus placebo.


Options:
A: Inclusion Criteria:

* Subject has had stable moderate to severe plaque psoriasis for at least 6 months
* Subject must be considered, in the opinion of the investigator, to be a suitable candidate for treatment with a biologic per regional labeling
* Subject has involved body surface area (BSA) ≥ 10%, PASI ≥ 12, and sPGA ≥ 3 at screening and at baseline

Exclusion Criteria:

* Subject diagnosed with erythrodermic psoriasis, pustular psoriasis, guttate psoriasis, medication-induced psoriasis, or other skin conditions at (eg, eczema) that would interfere with study evaluations
* Subject has known history of Crohn's disease
* Subject has any other significant concurrent medical condition or laboratory abnormalities, as defined in the study protocol
* Subject has stopped using certain psoriasis therapies as defined in the study protocol
* Subject has previously used any anti-IL-17 biologic therapy
B: Inclusion Criteria:

Part A:

* Able to provide written informed consent
* Healthy male or female between 18 to 45 years of age, inclusive at the time of screening
* Additional inclusion criteria apply

Part B:

* 18 - 55 years old inclusive at Screening
* Active but clinically stable, plaque psoriasis
* Psoriasis involving ≥ 10% of the body surface area
* A minimum PASI score of ≥ 10 obtained during the screening period
* Additional inclusion criteria apply

Exclusion Criteria:

Part A:

* History or evidence of a clinically significant disorder (including but not limited to cardiopulmonary, oncologic, renal, metabolic, hematologic or psychiatric), condition or disease that, in the opinion of the Investigator and Amgen physician would pose a risk to subject safety or interfere with the study evaluation, procedures or completion
* Underlying condition that predisposes the subject to infections (eg, uncontrolled diabetes - HbA1c \> 7%, history of splenectomy)
* Additional exclusion criteria apply

Part B:

* Active guttate, erythrodermic, or pustular psoriasis at the time of the screening visit
* Evidence of skin conditions other than psoriasis (eg, eczema) at the time of the screening visit or between the screening visit and study drug initiation that would interfere with evaluations of the effect of investigational product on psoriasis
* Any condition that, in the judgment of the investigator, might cause this study to be detrimental to the subject
* Additional exclusion criteria apply
C: Inclusion Criteria:

* Diagnosis of Psoriasis for 6 MO
* BSA 10%
* PASI 12 or above
* PGA 3 or above

Exclusion Criteria:

* Previous exposure to either etanercept or ABT-874
D: Inclusion Criteria:

* Are 18 years or older with diagnosis for at least 12 months of moderate to severe plaque psoriasis covering as least 10%of body surface area
* a Psoriasis Area and Severity Index (PASI) score of 12 and are considered to be candidates for systemic or light therapy
* No evidence of active or latent tuberculosis

Exclusion Criteria:

* Non-plaque or drug induced forms of psoriasis
* cannot discontinue current oral, injectible or topical therapy for psoriasis or cannot discontinue phototherapy (PUVA or UVB)
* any uncontrolled significant medical condition

Answer: D