associated with the eosinophilia were elevated serum ige levels ( 1,400 iu/ml and 10,500 iu/ml ) , depressed serum c4 complement levels ( 13 mg/100 ml and 6 mg/100 ml ) , and high titers of rheumatoid factor ( 1:2560 and 1:640 ) .
C0229671
serum
C0009498
complement