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A patient presents with a gallstone, and the ultrasound indicates that the common bile duct (CBD) measures within the borderline normal limit at 7mm (with no mentioned stones in the CBD). What is the next best step?

patient presents with no history of upper respiratory tract infection (URTI) or abdominal pain. Laboratory findings reveal low complement levels (complement 3 and 4), positive hepatitis C status, negative hepatitis B status, and palpable purpura. What is the most likely diagnosis?

In a patient declared brain dead, which reflex is most likely to be preserved?