Participants achieving a PASI-75 without the use of other background antipsoriasis therapy were considered responders. The PASI quantifies the severity of a psoriasis based on lesion severity and the percent of body surface area (BSA) affected. Erythema, thickness, and scaling are scored on a scale of 0 (none) to 4 (very severe) on 4 anatomic regions of the body: head, trunk, upper limbs, and lower limbs. Degree of involvement on each of the 4 anatomic regions is scored on a scale of 0 (no involvement) to 6 (90% to 100% involvement). The sum of severity scores for erythema, thickness, and scaling is multiplied by the degree of involvement for each anatomic region, and then multiplied by a constant corresponding to the region's percent BSA (0.1, 0.3, 0.2, and 0.4 for the above 4 regions, respectively). The resultant score for each anatomic region is then summed to yield the final PASI score. It ranges from 0 to 72, with higher scores reflecting greater disease severity.

* A TEAE was defined as any adverse event that began on or after the first dose of study drug or began before the first dose of study drug and worsened on or after the first dose of study drug. * An SAE is any untoward medical occurrence that results in 1 of the following: death, initial or prolonged inpatient hospitalization, a life-threatening experience (that is, immediate risk of dying), persistent or significant disability/incapacity, congenital anomaly/birth defect, or important medical events that may not be immediately life-threatening or result in death or hospitalization but may jeopardize the participant or may require intervention to prevent 1 of the other outcomes listed in the definition above.

A summary of AEs, TEAEs, SAEs and other non-serious adverse events (AEs), regardless of causality, will be reported in the reported adverse events module.

A summary of AEs, TEAEs, SAEs and other non-serious adverse events (AEs), regardless of causality, will be reported in the reported adverse events module.

A summary of AEs, TEAEs, SAEs and other non-serious adverse events (AEs), regardless of causality, will be reported in the reported adverse events module.