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A 10 day old presents with shaking of bilateral upper extremities and jitteriness. The patient was a term infant born NSVD with no complications. He is afebrile, HR 140, RR 50, and currently not having any abnormal movements. He has been feeding and urinating normally. His blood glucose is 120. Labs, EKG, head CT, and a CXR are performed – the CXR is shown here.


What is the most likely cause of his abnormal movements?