 This study used smartphones to develop a non-invasive technique for screening for anemia in infants and young children in Ghana. The study found that the use of smartphones and no additional hardware was able to accurately detect anemia, with a sensitivity of 92.9%, a specificity of 89.7%, and a positive predictive value of 93.5%. This article was authored by Thomas Allen Weems, Miranda Nixon Hill, Felix Outlaw, and others.