<abstract abstract-type="toc"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <graphic position="anchor" id="ga" xlink:href="ark:/27927/pgj2qrmfnmg" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" />A microfluidic device was used to deliver chirped glucose waves to find the entrainment regions of islets of Langerhans.</p> </abstract>