My son has and it came back negative. Not exactly sure what that means. My daughter has been diagnosed w/cyclic neutropenia and she is almost 5yrs - found it when she was 9 mos.. My youngest, 2 1/2 is also diagnosed w/it. His cycle isn't as predictable as my daughters. But both are very mild as they don't develop the symptoms that I read about.
Have you been tested for the gene?