He is researching on the pathogenesis and treatment of early-onset diabetes.

This area is rich in bedded cupriferous iron sulphide deposits.

Please teach me how to calculate the area of this circular sector.

He is suffering from acquired immune deficiency syndrome (AIDS).

She was diagnosed with polycystic ovary syndrome.

He was diagnosed with amyotrophic lateral sclerosis.

He said it was hard to bring up Mitsuru.

He contracted severe invasive streptococcal disease and underwent emergency surgery.