Figure 1.
Platelet count and therapy in case nos. 1 to 27. HPA-1a-positive platelet transfusions are indicated by black arrows and HPA-1a-negative transfusions by gray arrows with round heads. IVIG infusions are indicated by triangles and single doses of corticosteroids by squares. Newborns with platelet counts below 30 × 109/L (area shaded in gray) are considered to be at enhanced risk for major hemorrhage.
