{
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    "Salud y Trabajo en América Central. SALTRA Nicaragua, León, León, Nicaragua",
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    "Department of Medical Statistics, London School of Hygiene and Tropical Medicine, London, UK",
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    "Department of Environmental and Occupational Health, Kate Marmion School of Public Health, The University of Texas at San Antonio, San Antonio, Texas, USA",
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    "Hospital del Mar Medical Research Institute/Parc de Salut MAR, Barcelona, Spain",
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  "doi": "10.1136/bmjopen-2026-122893",
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  "id": "4mz35fjz4enxh",
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  "published": "2026-11-06",
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  "subjects": [
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  "title": "Migration, attrition and internal validity in longitudinal study of chronic kidney disease of unknown aetiology in Nicaragua",
  "title_text": "Migration, attrition and internal validity in longitudinal study of chronic kidney disease of unknown aetiology in Nicaragua",
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