"Randomized Controlled Trial Testing the Efficacy of Corticosteroid Therapy Versus Placebo in Fibrotic Hypersensitivity Pneumonitis"

"Active Comparator: prednisolone. Oral prednisolone will be administered and tapered over 6 months, according to the following schedule\*:~0.5 mg/kg/day (not exceeding 40mg/day) x 4 weeks, 0.25 mg/kg/day (not exceeding 20mg/day) x 4 weeks, 15 mg/day x 4 weeks, 10 mg/days x 4 weeks, 5 mg/day x 10 weeks"

Dispersible placebo administered and tapered over 6 months according to the schedule detailed in the protocol