What is the recommended procedure for collecting a 24-hour urine sample?
1
Collect all the urine voided in a 24-hour period
2
Collect the first morning specimen and all of the following specimens, except the next morning specimen
3
Start the timing, collect the first morning specimen and all of the following specimens including the next morning specimen
4
Void the first morning specimen, start the timing, and collect all of the following specimens including the next morning's specimen