Healthy volunteers were randomized to receive @ consecutive inhalations ( each administered as a single dose ) via a single ELLIPT dry powder inhaler : in study @ ( CTT@/NCT@ ) , FF/UMEC/VI at total doses of @/@/@ g , FF/UMEC @/@ g , UMEC/VI @/@ g , or FF/VI @/@ g ; in study @ ( @/NCT@ ) , FF/UMEC/VI at total doses of @/@/@ g or @/@/@ g , FF/VI @/@ g , or UMEC/VI @/@ g. PK and PD parameters and safety were assessed .