However, it is very difficult to determine their true cause.

A doctor cannot determine the cause of the child's death.

You should see your doctor to try to determine the cause.

"Further studies are needed to determine the cause of low B12 levels."

So it's important to see a doctor to determine the cause.

In 15 cases, the experts could not determine the cause of death.

The experts said they had yet to determine the cause of death.

Your task is to determine the cause of her death.

An investigation was done to determine the cause of death.

The police were also still trying to determine the cause of the crash.