var pgAd = '';
pgAd += "<"+"script src=\"https://www.googletagservices.com/tag/js/gpt.js\">googletag.pubads().definePassback(\"/149443272/254539152\", [728, 90]).setTargeting(\"pgpro\", \"12\").setTargeting(\"pgpid\", \"https%3A%2F%2Fwww.nature.com%2Fcollections%2Fhajgidghjb%2F\").setTargeting(\"pgiid\", \"158981453263361874378528167httpswwwnaturecomcollectionshajgidghjb\").setTargeting(\"pgzid\", \"167\").setTargeting(\"pgpub\", \"14\").setTargeting(\"pgscrh\", 1080).setTargeting(\"pgscrw\", 1920).setTargeting(\"pgtrgtype\", \"content\").setTargeting(\"pgtrgtime\", \"1589814532633\").setTargeting(\"pgjour\", \"\").setTargeting(\"pgpubadunit\", \"/270604982/nature/nature/collections\").setTargeting(\"pgpubparam\", \"%7B%22collectionid%22%3A%5B%22hajgidghjb%22%5D%2C%22logged%22%3A%5B%22n%22%5D%2C%22path%22%3A%5B%22%2Fcollections%2Fhajgidghjb%2F%22%5D%2C%22pos%22%3A%5B%22LB1%22%5D%2C%22tile%22%3A%5B%221%22%5D%2C%22type%22%3A%5B%22collections%22%5D%7D\").setTargeting(\"pgfireexc\", \"1\").display();<"+"/script>\n";
document.write(pgAd);