Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Bad value “https://fonts.googleapis.com/css?family=Nunito:600|Roboto:300,400,400i,500,500i” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “onderwerp-bloed” for attribute “rel” on element “a”: The string “onderwerp-bloed” is not a registered keyword.
Bad value “onderwerp-chromosomen” for attribute “rel” on element “a”: The string “onderwerp-chromosomen” is not a registered keyword.
Bad value “onderwerp-skelet” for attribute “rel” on element “a”: The string “onderwerp-skelet” is not a registered keyword.
Bad value “onderwerp-organen” for attribute “rel” on element “a”: The string “onderwerp-organen” is not a registered keyword.
Bad value “onderwerp-hormonen” for attribute “rel” on element “a”: The string “onderwerp-hormonen” is not a registered keyword.
Bad value “onderwerp-hersenenzenuwstelsel” for attribute “rel” on element “a”: The string “onderwerp-hersenenzenuwstelsel” is not a registered keyword.
Bad value “onderwerp-immuunsysteem” for attribute “rel” on element “a”: The string “onderwerp-immuunsysteem” is not a registered keyword.
Bad value “onderwerp-divers” for attribute “rel” on element “a”: The string “onderwerp-divers” is not a registered keyword.
Bad value “disease-aha” for attribute “rel” on element “a”: The string “disease-aha” is not a registered keyword.
Bad value “disease-astma” for attribute “rel” on element “a”: The string “disease-astma” is not a registered keyword.
Bad value “disease-coeliakie” for attribute “rel” on element “a”: The string “disease-coeliakie” is not a registered keyword.
Bad value “disease-craniofaryngeoom” for attribute “rel” on element “a”: The string “disease-craniofaryngeoom” is not a registered keyword.
Bad value “disease-cvs” for attribute “rel” on element “a”: The string “disease-cvs” is not a registered keyword.
Bad value “disease-cf” for attribute “rel” on element “a”: The string “disease-cf” is not a registered keyword.
Bad value “disease-diabetes” for attribute “rel” on element “a”: The string “disease-diabetes” is not a registered keyword.
Bad value “disease-epilepsie” for attribute “rel” on element “a”: The string “disease-epilepsie” is not a registered keyword.
Bad value “disease-hemofilie” for attribute “rel” on element “a”: The string “disease-hemofilie” is not a registered keyword.
Bad value “disease-hiv” for attribute “rel” on element “a”: The string “disease-hiv” is not a registered keyword.
Bad value “disease-hypofyse” for attribute “rel” on element “a”: The string “disease-hypofyse” is not a registered keyword.
Bad value “disease-ibd” for attribute “rel” on element “a”: The string “disease-ibd” is not a registered keyword.
Bad value “disease-dsd” for attribute “rel” on element “a”: The string “disease-dsd” is not a registered keyword.
Bad value “disease-jeugdreuma” for attribute “rel” on element “a”: The string “disease-jeugdreuma” is not a registered keyword.
Bad value “disease-klinefelter” for attribute “rel” on element “a”: The string “disease-klinefelter” is not a registered keyword.
Bad value “disease-nieren” for attribute “rel” on element “a”: The string “disease-nieren” is not a registered keyword.
Bad value “disease-schildklier” for attribute “rel” on element “a”: The string “disease-schildklier” is not a registered keyword.
Bad value “disease-sikkelcel” for attribute “rel” on element “a”: The string “disease-sikkelcel” is not a registered keyword.
Bad value “disease-downsyndroom” for attribute “rel” on element “a”: The string “disease-downsyndroom” is not a registered keyword.
Bad value “disease-thalassemie” for attribute “rel” on element “a”: The string “disease-thalassemie” is not a registered keyword.
Bad value “disease-willebrand” for attribute “rel” on element “a”: The string “disease-willebrand” is not a registered keyword.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
Warnings:
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
Empty heading.