Goldstein D S, Williams M H
Thorax. 1986 Jun;41(6):473-4. doi: 10.1136/thx.41.6.473.
Serial measurements of vital capacity were obtained in 11 patients with impaired pulmonary function due to sarcoidosis during 12 courses of corticosteroid treatment. Vital capacity improved promptly and approached a maximum value in about three weeks. A three week trial is probably sufficient to show whether or not corticosteroids are effective in a patient with sarcoidosis.