1. University of Bologna; Department of Education Studies “G.M. Bertin”; Via Filippo Re, 6 Bologna Italy 40126
2. FMUSP; Hemophilia Centre of Hospital Das Clinicas; Umburanas street 307 San Pablo Sao Paulo Brazil 05464000
3. University of Liverpool; Department of Biostatistics; Block F, Waterhouse Building 1-5 Brownlow Hill Liverpool UK L69 3GL
4. McMaster University; Department of Health Research Methods, Evidence and Impact (HEI); 1280 Main Street West CRL - 140 Hamilton ON Canada L8S 4K1