Complete blood cell count

To the Editor: The review by May et al¹ of 3 neglected numbers in the complete blood cell count (CBC) was a good reminder to look more closely at the results of the CBCs we often order in primary care. I was surprised to see no mention of the red cell distribution width in relation to another cardiovascular disorder—obstructive sleep apnea.^2,3 I wonder if the authors would comment on this association?