1. Agency Laín Entralgo (Cochrane Collaborating Centre); UETS, Health Technology Assessment Unit. UCICEC de Atención Primaria; Gran Vía 27, 7ª Planta Madrid Madrid Spain 28013
2. NHS Lanarkshire; Microbiology; Hairmyres Hospital Eaglesham Road East Kilbride Glasgow UK G75 8RG
3. Iberoamerican Cochrane Network; Valencia Edo. Carabobo Venezuela 2001
4. Marilia Medical School; Department of General Internal Medicine and Clinical Epidemiology Unit; Avenida Monte Carmelo 800 Fragata Marilia São Paulo Brazil 17519-030
5. Institute of Public Health Navarra; Epidemiology Department; C/ Leyre 15 Pamplona Navarre Spain E-31003
6. Catalan Institute of Oncology; Cancer Prevention and Control Unit; Gran Vía s/n Km 2,7 L´Hospitalet de Llobregat Cataluña Spain 08907
7. Lain Entralgo Agency, Regional Government of the Community of Madrid; Health Technology Assessment; Gran Via 27 Madrid Spain 28013
8. IIB Sant Pau; Iberoamerican Cochrane Centre; Sant Antoni Maria Claret 171 Edifici Casa de Convalescència Barcelona Catalunya Spain 08041