| pubmed-article:529254 | pubmed:abstractText | Antibodies to ribonucleoprotein are the serological marker of mixed connective tissue disease (MCTD). Five patients are presented who had negative or low titer anti-RNP antibodies despite characteristic MCTD. In all 5 patients antibodies to RNP appeared after they had taken prednisone for periods ranging from 3 wk to 15 months. | lld:pubmed |
