Koa has osteogenesis imperfecta, also known as OI, a rare genetic brittle bone condition that is life-threatening. OI is usually diagnosed before a baby is born, and parents are often given a ...

Patients were then followed up until they reached near-final height (i.e. their height at a bone age ≥15.75 years). Boys treated with testosterone and placebo reached a mean near-final height of ...