div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Royal Netherlands Academy of Arts and Sciences KNAWslides in phosphate-buffered saline solution they were incubated for one-half hour at room temperature 20 C with fluorescein src=https:reader035vdocumentinreader035viewer202208162161268eb5c3082f0fd62edaa8html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: Royal Netherlands Academy of Arts and Sciences KNAWslides in phosphate-buffered saline solution they were incubated for one-half hour at room temperature 20 C with fluorescein src=https:reader035vdocumentinreader035viewer202208162161268eb5c3082f0fd62edaa8html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: Royal Netherlands Academy of Arts and Sciences KNAWslides in phosphate-buffered saline solution they were incubated for one-half hour at room temperature 20 C with fluorescein src=https:reader035vdocumentinreader035viewer202208162161268eb5c3082f0fd62edaa8html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: Royal Netherlands Academy of Arts and Sciences KNAWslides in phosphate-buffered saline solution they were incubated for one-half hour at room temperature 20 C with fluorescein src=https:reader035vdocumentinreader035viewer202208162161268eb5c3082f0fd62edaa8html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: Royal Netherlands Academy of Arts and Sciences KNAWslides in phosphate-buffered saline solution they were incubated for one-half hour at room temperature 20 C with fluorescein src=https:reader035vdocumentinreader035viewer202208162161268eb5c3082f0fd62edaa8html5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 6button div class=ts-image amp-img class=ts-thumb alt=Page 6: Royal Netherlands Academy of Arts and Sciences KNAWslides in phosphate-buffered saline solution they were incubated for one-half hour at room temperature 20 C with fluorescein src=https:reader035vdocumentinreader035viewer202208162161268eb5c3082f0fd62edaa8html5thumbnails6jpg width=142 height=106 layout=responsive amp-img divdiv