| Author, year | Patients and controls | Number of genes tested | Differentially expressed genes |
| Vernon et al, 200231 | 5 patients, 17 controls | 1764 genes | CMRF35 antigen, IL-8, HD protein |
| Powell et al, 200329 | 7 patients, 4 controls | Differential display | Cathepsin C and MAIL1, TNFα, Moesin |
| Kaushik et al, 200530 | 25 patients, 25 controls | 9522 genes | ABCD4, PRKCL1, MRPL23, CD2BP2, KHSRP, BRMS1, GABARAPL1 (IL-10RA ↓) |