- Surgeons in Miami use 3-D-printed model of a girl's heart to plan her complicated surgery
- Simulated organs are being used to prepare and practice for many operations
- Eventually, 3-D printers could produce organs that can be transplanted into patients
(CNN)Mia Gonzalez spent the first 3½ years of her life missing out. She had to skip day care and dance classes because she constantly had colds and pneumonia. When Mia could go out and play, she was easily winded and took multiple asthma medications to try to help her breathing.