Assays for hepatitis B surface antigen (HBsAg) are the most frequently used tests to detect HBV infection. Vaccination for HBV can produce transiently detectable levels of HBsAg in patients.

Anorexia nervosa (AN) is a serious psychiatric disorder involving self-starvation, an intense fear of weight gain, and compulsive hyperactivity, which has led to a mortality rate around 16.9 times ...