Fig. 1From: ATP bioluminescence values are significantly different depending upon material surface properties of the sampling location in hospitalsClassification of material surface properties. The material surface properties of the sampling sites were divided into six categories: melamine coated, vinyl chloride, stainless steel, wood, acrylonitrile-butadiene styrene resin coated, and antibacterial vinyl chloride. *because of one missing sample, there are 751 sites with ATP dataBack to article page