The FDA has approved Incyte’s (NSDQ:INCY) ruxolitinib, a cream for short-term and non-continuous chronic treatment of mild-to-moderate atopic dermatitis (eczema). As many as 15 million Americans have atopic dermatitis, according to the Cleveland Clinic. In addition, the NIH estimates that the condition affects 30 million Americans, predominantly children and adolescents. The labeling for ruxolitinib (Opzelura) constrains its…