div class=trans-pagebuttonPage 1button div class=trans-image a href=https:reader042fdocumentsusreader042viewer2022020523575068771a28ab0f07b04b5ahtml5page1jpg target=_blank amp-img class=trans-thumb alt=Page 1: An extrachromosomal factor causing loss of paternal chromosomes src=https:reader042fdocumentsusreader042viewer2022020523575068771a28ab0f07b04b5ahtml5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divp© 1987 Nature Publishing Grouppdivdiv class=trans-pagebuttonPage 2button div class=trans-image a href=https:reader042fdocumentsusreader042viewer2022020523575068771a28ab0f07b04b5ahtml5page2jpg target=_blank amp-img class=trans-thumb alt=Page 2: An extrachromosomal factor causing loss of paternal chromosomes src=https:reader042fdocumentsusreader042viewer2022020523575068771a28ab0f07b04b5ahtml5thumbnails2jpg width=142 height=106 layout=responsive amp-imga divp© 1987 Nature Publishing Grouppdiv