A handful of soldiers, their faces covered by black masks to hide their identities, guard the front gate of Salmaniya Medical Complex. Inside, clinics are virtually empty of patients, many of whom, doctors say, have been hauled away for detention after participating in protests. Doctors and nurses have been arrested, too, and the police trail ambulance drivers, health care workers said. To the government, Salmaniya, Bahrain's largest public hospital, and local clinics are nests of radical Shiite conspirators trying to destabilize the country. But to many doctors at Salmaniya, the hospital has been converted into an apparatus of state terrorism, and sick people have nowhere to go for care.