A 51 year-old man visits his physician for a routine physical examination. He has no health complains. He smokes 1 pack of cigarettes and drinks a cup of wine daily for 30 years. He has no significant past history and takes no medications. He has no significant family history and both his parents are healthy. Physical examination and blood tests are normal. What is the test recommended to be done next? A- Chest x-ray B- Liver function tests C- Kidney function tests D- Colonoscopy E- Prostate-specific antigen (PSA) test http://medical-usmle.com/?p=890
