Regarding the examination of red blood cells, which of the following statement is INCORRECT?
选项：

A:Severe vomiting can cause a relative increase in red blood cells;
B:Polycythemia vera can cause an absolute increase in red blood cells;
C:Women may have erythrocyte reduction in late pregnancy;
D:Secondary erythrocytosis has nothing to do with EPO;
E:Reticulocyte count helps the differential diagnosis of anemia