Cluster 139: infectious interstitial pneumonitis lung non active evidence disease history known Cluster 193: pneumonitis infectious steroids required non known history cohort current participants Cluster 759: pregnancy current known female patient active exclusion patients required test Cluster 822: infectious pneumonitis non evidence active known history patient process steroids Cluster 1852: pneumonitis infectious steroids current required non history active known evidence Cluster 2487: pneumonitis infectious interstitial non lung steroids required history disease evidence