HealthDay の記事です
http://www.healthdayjapan.com/index.php?option=com_content&view=article&id=6154:2015831&catid=51&Itemid=104
http://consumer.healthday.com/respiratory-and-allergy-information-2/food-allergy-news-16/got-a-rash-nickel-may-have-caused-it-skin-doctor-says-702435.html
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