Study: NCT02982187

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo ELLIPTA
Description: It is a dry powder inhaler device that can hold two individual blisters: one placebo strip containing lactose monohydrate and a second placebo strip containing lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo ELLIPTA
Description: It is a dry powder inhaler device that can hold two individual blisters: one placebo strip containing lactose monohydrate and a second placebo strip containing lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo ELLIPTA
Description: It is a dry powder inhaler device that can hold two individual blisters: one placebo strip containing lactose monohydrate and a second placebo strip containing lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo ELLIPTA
Description: It is a dry powder inhaler device that can hold two individual blisters: one placebo strip containing lactose monohydrate and a second placebo strip containing lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo ELLIPTA
Description: It is a dry powder inhaler device that can hold two individual blisters: one placebo strip containing lactose monohydrate and a second placebo strip containing lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo ELLIPTA
Description: It is a dry powder inhaler device that can hold two individual blisters: one placebo strip containing lactose monohydrate and a second placebo strip containing lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo ELLIPTA
Description: It is a dry powder inhaler device that can hold two individual blisters: one placebo strip containing lactose monohydrate and a second placebo strip containing lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo ELLIPTA
Description: It is a dry powder inhaler device that can hold two individual blisters: one placebo strip containing lactose monohydrate and a second placebo strip containing lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo DISKUS
Description: It is a placebo dry powder inhaler with one blister strip containing lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo DISKUS
Description: It is a placebo dry powder inhaler with one blister strip containing lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo DISKUS
Description: It is a placebo dry powder inhaler with one blister strip containing lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo DISKUS
Description: It is a placebo dry powder inhaler with one blister strip containing lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo TURBUHALER
Description: It is a placebo dry powder inhaler containing lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo TURBUHALER
Description: It is a placebo dry powder inhaler containing lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo TURBUHALER
Description: It is a placebo dry powder inhaler containing lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo TURBUHALER
Description: It is a placebo dry powder inhaler containing lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo HANDIHALER
Description: Placebo capsules contain lactose monohydrate in the form of powder for oral inhalation, to be used with HANDIHALER device.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo HANDIHALER
Description: Placebo capsules contain lactose monohydrate in the form of powder for oral inhalation, to be used with HANDIHALER device.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo HANDIHALER
Description: Placebo capsules contain lactose monohydrate in the form of powder for oral inhalation, to be used with HANDIHALER device.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo HANDIHALER
Description: Placebo capsules contain lactose monohydrate in the form of powder for oral inhalation, to be used with HANDIHALER device.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo HANDIHALER
Description: Placebo capsules contain lactose monohydrate in the form of powder for oral inhalation, to be used with HANDIHALER device.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo HANDIHALER
Description: Placebo capsules contain lactose monohydrate in the form of powder for oral inhalation, to be used with HANDIHALER device.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo HANDIHALER
Description: Placebo capsules contain lactose monohydrate in the form of powder for oral inhalation, to be used with HANDIHALER device.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Placebo HANDIHALER
Description: Placebo capsules contain lactose monohydrate in the form of powder for oral inhalation, to be used with HANDIHALER device.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: PQ1
Description: Consists of 2 questions to assess subjects' preference of device attributes and dosing regimens. The 4 versions of the questionnaire ask the same questions, but differ in the ordering of inhalers in their responses.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: PQ1
Description: Consists of 2 questions to assess subjects' preference of device attributes and dosing regimens. The 4 versions of the questionnaire ask the same questions, but differ in the ordering of inhalers in their responses.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: PQ2
Description: Consists of 2 questions to assess subjects' preference of device attributes and dosing regimens. The 4 versions of the questionnaire ask the same questions.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: PQ2
Description: Consists of 2 questions to assess subjects' preference of device attributes and dosing regimens. The 4 versions of the questionnaire ask the same questions.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: PQ3
Description: Consists of 2 questions to assess subjects' preference of device attributes and dosing regimens. The 4 versions of the questionnaire ask the same questions.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: PQ3
Description: Consists of 2 questions to assess subjects' preference of device attributes and dosing regimens. The 4 versions of the questionnaire ask the same questions.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: PQ4
Description: Consists of 2 questions to assess subjects' preference of device attributes and dosing regimens. The 4 versions of the questionnaire ask the same questions.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: PQ4
Description: Consists of 2 questions to assess subjects' preference of device attributes and dosing regimens. The 4 versions of the questionnaire ask the same questions.