title: Hidden bias in research design.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D000927:Anticonvulsants / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D006801:Humans; D012107:Research Design; D012640:Seizures / Q000175:diagnosis; D003294:Seizures, Febrile / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology
chemical_list: D000927:Anticonvulsants