A cross-sectional conductive study at the University of Chicago Medicine facilities (hospital and outreach clinics) will be conducted to include a total of 250 newborns with a desired distribution of skin color according to Neomar's scale : skin color 1 and 2: 20%, skin color 3: 30% and skin color 4: 50%. Skin color may also be quantitatively assessed using a handheld spectrophotometer (CM-700d, Konica Minolta).
The Picterus Calibration Card will be placed on the chest of the newborn with the hole in the card placed over the infant's chest. A validated smartphone with Picterus JP will be used to collect digital images, which are analysed to calculate a Picterus bilirubin value.
