Overall, secondary causes are more common than primary ones.

Attempts must be made to determine whether there is a secondary cause amenable to treatment.

And now as to the secondary causes which attracted him to children.

According to this theory, the dingo was only a secondary cause.

Blood loss is usually a secondary cause of death.

Renal disease is the most common secondary cause of hypertension.

The most significant cause is treated first, followed by treatment for secondary causes, if needed.

However, in these cases, one must still rule out other secondary causes.

Evaluations to exclude secondary causes are necessary but usually negative.

"A secondary cause would be the speeding, if that's what the van was doing."