Appendicitis or non-specific abdominal pain in pre-school children: When to request abdominal ultrasound?

1. Prada-Arias, M.
2. Gómez-Veiras, J.
3. Vázquez, J.L.
4. Salgado-Barreira, Á.
5. Montero-Sánchez, M.
6. Fernández-Lorenzo, J.R.