The victims were among the most vulnerable. Their plight brought one hospital official to tears and drew flashes of anger from another yesterday as they described a horrifying case of child molestation and pornography at Children's Convalescent Hospital. A 54-year-old respiratory therapist has been arrested on 40 counts of possession, manufacture and distribution of child pornography and two counts of lewd and lascivious acts on two children under 14. In all, the charges involve nine children. A cell phone allegedly was used to take photographs of bedridden children at the 59-bed convalescent center, which is part of the Children's Hospital...