#128 fix check to hide box

packages/doi/src/components/DOIInfo/DOIRelated.tsx

@@ -6,7 +6,7 @@ import { Suspense } from 'react';
 import { Card } from 'react-bootstrap';
 
 export function DOIRelated({ doi }: { doi: DOI }) {
-  if (doi.relatedDOI?.length === 0 && !doi.referenceURL) {
+  if ((!doi.relatedDOI || doi.relatedDOI?.length === 0) && !doi.referenceURL) {
     return null;
   }
   return (