"The most common aetiologies are tuberculosis and rheumatoid arthritis 1,2,4,5. Other far less common causes include neoplasm (e.g. lung cancer), other infections (e.g. syphilis, echinococcosis), and other exceedingly rare causes 1,2,4,5,8."
Line 9:179·More than 5 commas in a single sentence might make it more difficult to read.