Jana Block, MSc (IMAGE) St. Anna Children's Cancer Research Institute Caption "Initially, we had only one patient and therefore did not know which symptoms were related to the gene defect and which were just additional accompanying manifestations. That was quite a challenge," says Jana Block, first author of the publication and a PhD student in Boztug's research group at St. Anna CCRI and CeMM. Credit St. Anna Children's Cancer Research Institute Usage Restrictions no restriction if credit is added License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.