Received: 25 March 2019
Accepted: 9 October 2019
First Online: 1 November 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of the Regional Cancer Institute in March 2004 (University Hospital of Besancon, France). Written consent was obtained from all patients. Blood samples taken as part of the regular exercise of the service.
: Not applicable
: The authors declare that they have no competing interests.