Adult Anesthetics, Intravenous--therapeutic use Anticonvulsants--therapeutic use Clonazepam--therapeutic use Coma--chemically induced Dose-Response Relationship, Drug Drug Therapy, Combination Electroencephalography--statistics & numerical data Female Humans Infusions, Intravenous Male Monitoring, Physiologic--statistics & numerical data Propofol--administration & dosage Retrospective Studies Status Epilepticus--diagnosis Thiopental--administration & dosage Treatment Outcome