Financial & competing interests disclosure
Wally R Smith is supported by funding from grants 1U54HL090516, 1U10HL083732 and 1 R01 HL 64122 from the National Heart, Lung and Blood Institute at the National Institute of Health. The author has no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.