Authors’ contributions
PD, MM
RECRUITMENT
CV designed and got funding for the study. JV, PvO, BP, AG, MM, and PD contributed to the conception of the study. AG coordinates the recruitment of patients and the data collection. CV, AG, MM, KS, PD and CvdB are responsible for the recruitment of patients and management of their site. AG drafted the first manuscript. CV, JV, PvO, BP, MM, KS, PD and CvdB commented on the manuscript. All authors read and approved the last version of the manuscript.