If the workers' compensation insurance requires preauthorization for certain services, the preauthorization must be obtained before services are rendered; this does NOT apply if the services were provided in an emergency situation

Which group of disorders is categorized together because of similarities in their clinical presenta-tions, plain chest radiographic appearance, and physiologic features?

a. Congestive heart failure b. Infant respiratory distress syndrome c. Interstitial lung diseases d. Sudden acute respiratory syndrome

When pouring up an impression for a die, the best stone to use is ___________

orthodontic stone. class II stone. quick-set stone. class I stone.