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    "Department of Medicine, Section of Nephrology, Boston Medical Center and Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts, USA",
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    "Department of Pathology and Laboratory Medicine, Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts, USA",
    "Agency for Agricultural Development and Health (AGDYSA), San Salvador, El Salvador",
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    "Division of Nephrology, Stanford University School of Medicine, Stanford, California, USA",
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    {
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    {
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    {
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  "title": "Spurious Electrolyte and Creatinine Levels in Previously Frozen Serum Samples",
  "title_text": "Spurious Electrolyte and Creatinine Levels in Previously Frozen Serum Samples",
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  "updated_at": "2026-10-30T12:34:17Z",
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