Elizabeth is a 14-year-old girl referred to our clinic as her urine dipstick test was positive for red blood cells during the routine check-up in her family doctor’s clinic. Elizabeth was initially reassured as the family doctor suspected the urine test may be contaminated with menstrual blood. The test was repeated several weeks later. However, it was still positive, so Elizabeth was referred for further assessment. What are the steps for evaluation of Elizabeth's haematuria?