<ref>http://www.ncbi.nlm.nih.gov/pubmed/14740430</ref> (Link)
{{cite journal
|author=Hellmich B, Ehlers S, Csernok E, Gross WL
|title=Update on the pathogenesis of Churg-Strauss syndrome
|journal=Clin. Exp. Rheumatol.
|volume=21
|issue=6 Suppl 32
|pages=S69–77
|year=2003
|pmid=14740430
|url=http://www.clinexprheumatol.org/article.asp?a=2254
}}