He himself has that too. Houtenaar Kaj van Diemen (26) had a brain haemorrhage when he was not even born yet. In the thirtieth week of her pregnancy, his mother developed hard bellies and felt ‘something snap’. She knew right away that it wasn’t right. Acting quickly – luckily she was a pediatrician herself – prevented worse. But that did not prevent Kaj from spending large parts of his childhood in hospitals.