div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=whos-ahead-whos-behindhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Whos ahead whos behind loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader038vdocumentsmxreader038viewer2022100511575068601a28ab0f07afe2d0html5thumbnails1jpg width=140 height=200 divp© Nature Publishing Group1980pdiv