div class=ts-pagebuttonPage 1button div class=ts-image a href=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5page1jpg target=_blank amp-img class=ts-thumb alt=Page 1: imagesnaturecom · observation is dependent on the maternal drug history among drugs in a therapeutic class the ratio of human milk to maternal plasma drug concentration src=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=ts-pagebuttonPage 2button div class=ts-image a href=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5page2jpg target=_blank amp-img class=ts-thumb alt=Page 2: imagesnaturecom · observation is dependent on the maternal drug history among drugs in a therapeutic class the ratio of human milk to maternal plasma drug concentration src=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=ts-pagebuttonPage 3button div class=ts-image a href=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5page3jpg target=_blank amp-img class=ts-thumb alt=Page 3: imagesnaturecom · observation is dependent on the maternal drug history among drugs in a therapeutic class the ratio of human milk to maternal plasma drug concentration src=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5thumbnails3jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=ts-pagebuttonPage 4button div class=ts-image a href=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5page4jpg target=_blank amp-img class=ts-thumb alt=Page 4: imagesnaturecom · observation is dependent on the maternal drug history among drugs in a therapeutic class the ratio of human milk to maternal plasma drug concentration src=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5thumbnails4jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=ts-pagebuttonPage 5button div class=ts-image a href=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5page5jpg target=_blank amp-img class=ts-thumb alt=Page 5: imagesnaturecom · observation is dependent on the maternal drug history among drugs in a therapeutic class the ratio of human milk to maternal plasma drug concentration src=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5thumbnails5jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=ts-pagebuttonPage 6button div class=ts-image a href=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5page6jpg target=_blank amp-img class=ts-thumb alt=Page 6: imagesnaturecom · observation is dependent on the maternal drug history among drugs in a therapeutic class the ratio of human milk to maternal plasma drug concentration src=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5thumbnails6jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=ts-pagebuttonPage 7button div class=ts-image a href=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5page7jpg target=_blank amp-img class=ts-thumb alt=Page 7: imagesnaturecom · observation is dependent on the maternal drug history among drugs in a therapeutic class the ratio of human milk to maternal plasma drug concentration src=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5thumbnails7jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=ts-pagebuttonPage 8button div class=ts-image a href=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5page8jpg target=_blank amp-img class=ts-thumb alt=Page 8: imagesnaturecom · observation is dependent on the maternal drug history among drugs in a therapeutic class the ratio of human milk to maternal plasma drug concentration src=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5thumbnails8jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=ts-pagebuttonPage 9button div class=ts-image a href=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5page9jpg target=_blank amp-img class=ts-thumb alt=Page 9: imagesnaturecom · observation is dependent on the maternal drug history among drugs in a therapeutic class the ratio of human milk to maternal plasma drug concentration src=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5thumbnails9jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=ts-pagebuttonPage 10button div class=ts-image a href=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5page10jpg target=_blank amp-img class=ts-thumb alt=Page 10: imagesnaturecom · observation is dependent on the maternal drug history among drugs in a therapeutic class the ratio of human milk to maternal plasma drug concentration src=https:reader042vdocumentssitereader042viewer20220307105af94d167f8b9a44658d845fhtml5thumbnails10jpg width=142 height=106 layout=responsive amp-imga divdiv