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          W85: Exposure to electric transmission lines
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          W86: Exposure to other specified electric current
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          W87: Exposure to unspecified electric current
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          W88: Exposure to ionizing radiation
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          W89: Exposure to man-made visible and ultraviolet light
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          W90: Exposure to other nonionizing radiation
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          W91: Exposure to unspecified type of radiation
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          W92: Exposure to excessive heat of man-made origin
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          W93: Exposure to excessive cold of man-made origin
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          W94: Exposure to high and low air pressure and changes in air pressure
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          W99: Exposure to other and unspecified man-made environmental factors
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