Case 1: "A 66-year-old female presents with acute confusion for 5 hours "
Case 2: "A 29-year-old HIV-infected female presents with chronic diarrhea for 20 months"
Case 3: "A 66-year-old male with persistent fever during admission for 1 month"
Case 4: "A 79-year-old female presents with progressive back pain for 5 months"
ENG