1. The Children's Hospital at Westmead - Parents - Inguinal hernia
Very young children need an operation as soon as a hernia appears because if the bowel gets caught in the hernia, it can be damaged. Inguinal hernias occur when the bowel pushes its way into a pouch in the groin.
http://www.chw.edu.au/parents/factsheets/suinguin.htm

2. The Posture Theory
Hence when a person with such features leans forward the pointed tip of the dagger shaped breastbone is pushed downwards, backwards, and sideways with a twisting motion into the area where the food pipe joins the stomach, Such repeated action...
http://users.chariot.net.au/~posture/

3. Dr. Francescopaolo Cardia
- Ultrasonographic signs of sliding gastric hiatal hernia and their prospective evaluation. Francescopaolo Cardia. Specialista in Medicina Interna. ecografia e color Doppler internistico. Studio medico specialistico.
http://www.webalice.it/fcardia/