Abbreviation for psychogenic nocturnal polydipsia.
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pancreatic polypeptide; paraneoplastic pemphigus; para-nitrophenol; peak negative pressure; pediatric nurse practitioner; peripheral neuropathy; pneumoperitoneum; polyneuropathy; predictive value of negative results; psychogenic nocturnal polydipsia; purine nucleoside phosphorylaseMedical dictionary. 2011.