"Some people who are otherwise healthy have white cell counts that are lower than what's usually considered normal, but which are normal for them."
from http://www.mayoclinic.org/symptoms/low-white-blood-cell-count/basics/definition/sym-20050615?
"Some people who are otherwise healthy have white cell counts that are lower than what's usually considered normal, but which are normal for them."
from http://www.mayoclinic.org/symptoms/low-white-blood-cell-count/basics/definition/sym-20050615?