
<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><a href="http://www.pnas.org/content/early/2018/07/31/1810141115" class="">http://www.pnas.org/content/early/2018/07/31/1810141115</a><div class=""><br class=""></div><div class="">a good and hopefully not too hot day</div><div class=""><br class=""></div><div class="">a</div><div class=""><br class=""></div><div class=""><br class=""></div></body></html>