Heidi Jackson's physician ordered a creatinine clearance test, which requires a 24-hour urine collection. She voided her bladder in the toilet at 8:00 AM the first morning and collected all of the urine that day. At 1:00 AM the next morning, she went to the bathroom and neglected to save that urine. 1. What is the most common problem with 24 -hour urine collection? 2. Would the creatinine clearance be affected by the omission of one sample