case_images: PMC4722759_01
case_images: Skin prick testing result for ultrasound gel vs positive histamine control
case_images: 13223_2015_106_Fig1_HTML.jpg
case_images: PMC4722759_01_13223_2015_106_Fig1_HTML.jpg
case_images: Fig1
case_images: These results were validated in our patient by both positive histamine and negative saline controls (Fig. 1).