Study: NCT03227445

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: ELLIPTA placebo DPI
Description: ELLIPTA is a dry powder inhaler used via oral route. It will be a placebo DPI with two strips with 30 blisters per strip. First strip will contain lactose monohydrate and the second strip will contain lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: ELLIPTA placebo DPI
Description: ELLIPTA is a dry powder inhaler used via oral route. It will be a placebo DPI with two strips with 30 blisters per strip. First strip will contain lactose monohydrate and the second strip will contain lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: ELLIPTA placebo DPI
Description: ELLIPTA is a dry powder inhaler used via oral route. It will be a placebo DPI with two strips with 30 blisters per strip. First strip will contain lactose monohydrate and the second strip will contain lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: ELLIPTA placebo DPI
Description: ELLIPTA is a dry powder inhaler used via oral route. It will be a placebo DPI with two strips with 30 blisters per strip. First strip will contain lactose monohydrate and the second strip will contain lactose monohydrate blended with magnesium stearate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: DISKUS placebo DPI
Description: DISKUS is a dry powder inhaler used via oral route. It will be a placebo DPI with one blister strip that will contain lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: DISKUS placebo DPI
Description: DISKUS is a dry powder inhaler used via oral route. It will be a placebo DPI with one blister strip that will contain lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: DISKUS placebo DPI
Description: DISKUS is a dry powder inhaler used via oral route. It will be a placebo DPI with one blister strip that will contain lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: DISKUS placebo DPI
Description: DISKUS is a dry powder inhaler used via oral route. It will be a placebo DPI with one blister strip that will contain lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: HandiHaler placebo DPI
Description: HandiHaler is a dry powder inhaler used via oral route. It will be a DPI with placebo capsules that will contain lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: HandiHaler placebo DPI
Description: HandiHaler is a dry powder inhaler used via oral route. It will be a DPI with placebo capsules that will contain lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: HandiHaler placebo DPI
Description: HandiHaler is a dry powder inhaler used via oral route. It will be a DPI with placebo capsules that will contain lactose monohydrate.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: HandiHaler placebo DPI
Description: HandiHaler is a dry powder inhaler used via oral route. It will be a DPI with placebo capsules that will contain lactose monohydrate.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Inhaler preference questionnaires
Description: Preference questionnaires will be given to subjects to understand the inhaler preference. There will be 2 types of questionnaire, preference questionnaires 1 and 2, which will be randomized at visit 3 (Day 56).

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Inhaler preference questionnaires
Description: Preference questionnaires will be given to subjects to understand the inhaler preference. There will be 2 types of questionnaire, preference questionnaires 1 and 2, which will be randomized at visit 3 (Day 56).

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Inhaler preference questionnaires
Description: Preference questionnaires will be given to subjects to understand the inhaler preference. There will be 2 types of questionnaire, preference questionnaires 1 and 2, which will be randomized at visit 3 (Day 56).

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Inhaler preference questionnaires
Description: Preference questionnaires will be given to subjects to understand the inhaler preference. There will be 2 types of questionnaire, preference questionnaires 1 and 2, which will be randomized at visit 3 (Day 56).