Recent studies suggest that badly behaved doctors contribute to medical mistakes, preventable complications, and even death. A survey of healthcare workers at 102 nonprofit hospitals from 2004 to 2007 found that 67% of respondents said they thought there was a link between disruptive behavior and medical mistakes, and 18% said they knew of a mistake that occurred because of an obnoxious doctor. Another survey by the Institute for Safe Medication Practices found that 40% of hospital staff members reported having been so intimidated by a doctor that they did not share their concerns about orders for medication that appeared to be incorrect. As a result, 7% said they contributed to a medication error.