I’m surprised the hospital said they were confident it was safe. I wonder what gave them confidence? I’m struggling to think of what data I could have on hand that would convince me it was really safe. Also, to folks saying that randomness is clumpy… did you read the article? I think a bunch of nurses that notice they are all getting sick (and then FIVE of them getting brain tumors) should be taken quite seriously. I’d start with the assumption that there IS an environmental problem and then figure out what it is.