10 mL aliquot from each of two timed urine collections-one collected while patient is at rest (resting) in a supine position (typically 7-9 hour collection), and the second collected during ambulatory hours (upright) while the patient is upright (typically 15-17 hours), both collections occurring over the course of a 24-hour period. Label each specimen appropriately (upright or resting).
Collect specimens without preservative.