List seven radiographic features of the thalassemias.

1. Expanded marrow space (sign of marrow hyperplasia)
2. Hair-on-end skull
3. Erlenmeyer flask modeling deformities of the long bones
4. Paravertebral masses (a sign of extramedullary hematopoiesis)
5. Premature growth plate closure
6. Diffuse bone sclerosis
7. H-shaped vertebrae