1. Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Università degli Studi di Milano; Obstetrics and Gynecology Department; Via Commenda 12 - Clinica Mangiagalli, piano terra Milan Milan Italy 20122
2. Department 7812, Rigshospitalet, Copenhagen University Hospital; Cochrane Hepato-Biliary Group, Copenhagen Trial Unit, Centre for Clinical Intervention Research; Copenhagen Denmark
3. Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Università degli Studi di Milano; Gastro-Intestinal Unit; Via Commenda 12 - Clinica Mangiagalli, 1° piano, scala A Milan Milan Italy 20122
4. Università degli Studi di Milano; Dipartimento di Scienze Biomediche e Cliniche "L. Sacco"; via GB Grassi 74 Milan Italy 20157
5. Clinical Hospital Centre Rijeka; Obstetrics and Gynecology; Cambierieva 17 Rijeka Croatia 51000
6. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Rigshospitalet, Copenhagen University Hospital; Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100