LATEST: The congregation at Dennis Quaid's local church is praying for the actor's critically ill twin babies. Newborns Thomas Boone and Zoe Grace are in intensive care after they were given 1,000 times the normal 10 unit dose of blood-thinning drug Heparin by staff at Los Angeles' Cedar's Sinai hospital by mistake. Billy Carter of Mountain Springs Baptist Church in Livingston, Montana - near Quaid and wife Kimberly's country retreat in the state - insists he and worshippers at the church are praying for the twins. Carter says, "Our church did pray and will continue to pray for Mr Quaid and his family until the Lord heals the children." Meanwhile, a leading toxicology expert has offered hope the tiny pair will recover - telling OK magazine, "If there was no complication from the Heparin and no bleeding in any area, there should be no longterm effects.