Converse of object

• have: All participants were healthy and did not have sleep apnea, restless legs syndrome, or use sleep medications.

Adjective modifier

• obstructive: Surgical management of obstructive sleep apnea in children with Down syndrome.

Modifies a noun

• syndrome: Determinants of growth in children with the obstructive sleep apnea syndrome.

Preposition: in

• child: Surgical management of obstructive sleep apnea in children with Down syndrome.