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Figures
Figure 1: Patches of eczematous dermatitis on patient's face (left) in areas that came into contact with the headset of his cellphone (right).
Figure 2: Spot tests for free nickel were performed by adding a dimethylglyoxime and ammonium hydroxide solution to a cotton-tipped applicator and then rubbing the applicator on areas of cellphones likely to have skin contact. A pink colour on the applicator tip indicates the presence of free nickel (left). In some models, the area around the screen and the menu button tested positive for free nickel (right).