<select class="custom-select" name="tissue">
<optgroup label="Normal">
<option value="Adrenal">Adrenal</option>
<option value="Astrocyte">Astrocyte</option>
<option value="GM12878">Blood - GM12878</option>
<option value="T-cell">Blood - T-cell</option>
<option value="Osteoblast">Bone - Osteoblast</option>
<option value="Breast">Breast</option>
<option value="H1-hESC">Embryonic Stem Cell Line - H1-hESC</option>
<option value="Esophagus">Esophagus</option>
<option value="Heart">Heart</option>
<option value="Kidney">Kidney</option>
<option value="Large Intestine">Large Intestine</option>
<option value="Liver">Liver</option>
<option value="Lung">Lung</option>
<option value="Myoblast">Muscle - Myoblast</option>
<option value="Myotube">Muscle - Myotube</option>
<option value="H9">Neural Stem Cells - H9</option>
<option value="Ovary">Ovary</option>
<option value="Pancreas">Pancreas</option>
<option value="Placenta">Placenta</option>
<option value="RWPE1">Prostate - RWPE1</option>
<option value="Keratinocyte">Skin - Keratinocyte</option>
<option value="Spleen">Spleen</option>
<option value="Stomach">Stomach</option>
<option value="Thymus">Thymus</option>
<option value="Thyroid">Thyroid</option>
<option value="Uterus">Uterus</option>
</optgroup>
<optgroup label="Cancer">
<option value="Karpas-422">Blood - Karpas-422</option>
<option value="OCI-LY7">Blood - OCI-LY7</option>
<option value="K562">Bone Marrow - K562</option>
<option value="SK-N-MC">Brain - SK-N-MC</option>
<option value="SK-N-SH">Brain - SK-N-SH</option>
<option value="HeLa-S3">Cervix - HeLa-S3</option>
<option value="HCT116">Colon - HCT116</option>
<option value="MCF-7">Epithelial - MCF-7</option>
<option value="HepG2">Liver - HepG2</option>
<option value="A549">Lung - A549</option>
<option value="PC-9">Lung - PC-9</option>
<option value="A673">Muscle - A673</option>
<option value="Panc1">Pancreas - Panc1</option>
<option value="MM.1S">Peripheral Blood - MM.1S</option>
<option value="PC-3">Prostate - PC-3</option>
</optgroup>
</select>
