{"eventGroups":[{"description":"Patients undergoing endonasal surgery for anterior skull base tumors, pituitary tumors, and skull base spinal fluid leaks using endonasal techniques.","id":"EG000","otherNumAffected":0,"otherNumAtRisk":52,"seriousNumAffected":0,"seriousNumAtRisk":52,"title":"Endonasal Group"},{"description":"Patients undergoing any neurosurgical procedure requiring general anesthesia that did not involve the endonasal corridor, such as spinal decompression procedures, craniotomies for trigeminal neuralgia, or shunting procedures.","id":"EG001","otherNumAffected":0,"otherNumAtRisk":42,"seriousNumAffected":0,"seriousNumAtRisk":42,"title":"Control Group"}],"frequencyThreshold":"0"}