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    				| 1. | Black foot disease occurs due to chronic exposure to | 
| Answer» Answer: Explanation: In China (Province of Taiwan) exposure to arsenic via drinking-water has been shown to cause a severe DISEASE of the blood vessels, which leads to gangrene, known as 'black foot disease'. ... However, studies in several countries have demonstrated that arsenic CAUSES other, LESS severe forms of PERIPHERAL VASCULAR disease. | |