You've got to love non-invasive tests like this, but the trade-off is lower accuracy. In this case, for example, it could give false positives for people who h

You've got to love non-invasive tests like this, but the trade-off is lower accuracy. In this case, for example, it could give false positives for people who have differently shape blood cells - e.g. sickle cell, spherocytosis, elliptocytosis.