{"eventGroups":[{"deathsNumAffected":0,"deathsNumAtRisk":50,"description":"Patients undergo bone marrow biopsy using the power drill. Patients complete questionnaires at baseline, 30 minutes after biopsy, and on days 1, 3, and 7.\n\nPower drill: Undergo bone marrow biopsy using power drill","id":"EG000","otherNumAffected":0,"otherNumAtRisk":50,"seriousNumAffected":0,"seriousNumAtRisk":50,"title":"Arm I (Biopsy Using Power Drill)"},{"deathsNumAffected":0,"deathsNumAtRisk":50,"description":"Patients undergo bone marrow biopsy using the traditional Jamshidi needle. Patients complete questionnaires at baseline, 30 minutes after biopsy, and on days 1, 3, and 7.\n\nJamshidi needle: Undergo bone marrow biopsy using Jamshidi needle","id":"EG001","otherNumAffected":0,"otherNumAtRisk":50,"seriousNumAffected":0,"seriousNumAtRisk":50,"title":"Arm II (Biopsy Using Jamshidi Needle)"}],"frequencyThreshold":"5","timeFrame":"Collected for each patient through day +7 after enrollment"}