'We gathered teams of doctors very quickly. And then we waited'

US trauma surgeon Dr Lillian Liao tells how hospital staff treated children and an adult injured in last week's Texas school shooting - and remembers those who didn't make it

A surgeon treating survivors of the school shooting in the US says the most difficult part of the experience has been thinking of the children who never arrived.

Dr Lilian Liao.

Speaking through tears, Dr Lillian Liao described the wounds of the children she and colleagues operated on, and those who did not make it. 

Dr Liao is the paediatric trauma medical director at