Task: Answer Verification
Input (English): Question: Is increased serum cancer antigen-125 a marker for severity of deep endometriosis?
Answer: Serum CA-125 levels were significantly increased in women with severe forms of endometriosis, OMA, and DIE lesions. In addition, elevated serum Ca-125 levels were associated with more severe and extended DIE lesions. In women with superficial peritoneal lesions, CA-125 levels were not different from women without endometriosis.
Output (English): yes