A 48-year-old male complains of abdominal pain that began about 6 months previously which is constant in nature, especially after meals and is located in the upper mid abdomen superior to the umbilicus. He also repos some heaburn that occurred during the previous year. He has been under significant stress and has been self-medicating himself with over-the-counter antacids, with some relief. He states that his stools have changed in colour over the previous 2 months and now are intermittently dark and tarry in consistency. The physician tests the patient's stool and finds following result. What organs are likely to be affected?