Declaration of interest
A M Vaughan has received grants from the NIH. S H I Kappe has received grants from the NIH, Bill and Melinda Gates Foundation, the Department of Defense and is an inventor listed on U.S. Patents pertaining to GAP technology. The authors have 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.