“…In fact, Cosway et al (2011) have recently argued that occult rib fractures in infancy have the highest positive predictive value for physical child abuse of all fractures. While manual antero-posterior compression of the chest such as occurs in the shaken baby syndrome is thought to be the primary mode of such injuries (Betz and Liebhardt, 1994), some studies have called this into question (Wolfson et al, 2005;Findley et al, 2012).…”