Neonates any gestational age and weight of both sexes. Postmenstrual age up to 44 full weeks at inclusion. Intended treatment with intravenous paracetamol for any indication or intended treatment with oral paracetamol for one of the following indications: fractures, intracranial or extracranial haemorrhages, chest tubes, postoperative pain or painful skin lesions. Informed written consent from both parents or legal guardian. Inclusion can be postponed 24 hours after treatment start.
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