[1] London Sch Econ & Polit Sci, Dept Social Policy & LSE Hlth, London, England
[2] Univ Castilla La Mancha, Talavera Reina, Toledo, Spain
[3] Red Investigacin Servicios Sanitarios Enfermedade, Madrid, Spain
[4] Fundacin Canaria Investigacin Sanitaria FUNCANIS, Palmas Gran Canaria, Las Palmas Gran Canaria, Spain
[5] Univ Castilla La Mancha, Toledo, Spain
[6] Evaluat & Planning Serv, Canary Islands Hlth Serv, Santa Cruz de La Palma, CA, Spain
[7] SpainRDR & CIBERER, Inst Rare Dis Res, ISCIII, Madrid, Spain
[8] Natl Ctr Rare Dis, Ist superiore sanitA ISS, Rome, Italy
[9] Centro Ric Cliniche Malattie Rare Aldo Cele Dacc, Ist Ric Farmacologiche Mario Negri, Ranica Bergamo, Italy
[10] Med Univ Plovdiv, Fac Publ Hlth, Dept Social Med & Publ Hlth, Plovdiv, Bulgaria
[11] Corvinus Univ Budapest, Dept Hlth Econ, Budapest, Hungary
[12] Leibniz Univ Hannover, Ctr Hlth Econ Res Hannover CHERH, Hannover, Germany
[13] URC Eco Ile France, AP HP, Paris, France
[14] Univ Paris Diderot, Sorbonne Paris Cite, ECEVE, UMRS 1123, Paris, France
[15] INSERM, ECEVE, U1123, Paris, France
[16] Swedish Inst Hlth Econ, Lund, Sweden
[17] Bocconi Univ, Ctr Res Hlth & Social Care Management CERGAS, Milan, Italy