1Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
2Department of Radiology, Research Hospital Policlinico San Donato, Via Morandi 30, 20097 San Donato Milanese, Milan Italy
3Department of Radiology, Haukeland University Hospital, Jonas Lies vei 65, 5021 Bergen, Norway
4Department of Radiology, Reina Sofía Hospital, Avda. Menéndez Pidal, s/n 14004 Córdoba, Spain
5Department of Radiology, Karolinska University Hospital, Karolinska vägen, 171 76 Solna, Stockholm Sweden
6Department of Radiology, Meander Medical Center, Maatweg 3, 3813 Amersfoort, The Netherlands
7Department of Radiology, Gustave-Roussy Institute, 114 Rue Edouard Vaillant, 94800 Villejuif, France
8Department of Biomedical Imaging and Image-guided Therapy, Division of Molecular and Gender Imaging, Medical University of Vienna/Vienna General Hospital, Währinger Gürtel 18-20, 1090 Wien, Austria
9Clinic of Radiology, University Clinical Center Sarajevo, Bolnička 25, 71000 Sarajevo, Bosnia and Herzegovina
10Clinic of Radiology, Charité, Universitätsmedizin Berlin, 10117 Berlin, Germany
11Diagnostic Imaging Center, Institute of Oncology, Institutski put 4, 21204 Sremska Kamenica, Serbia
12Radiology Department, National Cancer Institute, Santariskiu 1, Vilnius University, Vilnius, Lithuania
13Department of Diagnostic and Interventional Radiology, University Hospital ‘Dubrava’, University of Zagreb School of Medicine, Avenija Gojka Šuška 6, 10000 Zagreb, Croatia
14Department of Radiology, Hospital de la Ribera, Carretera de Corbera, Km. 1, 46600 Alzira, Valencia Spain
15Radiology Unit, Hospices Civils de Lyon, Centre Hospitalo-Universitaire Lyon Sud, 165 Chemin du Grand Revoyet, 69495 Pierre Bénite Cedex, France
16Nottingham Breast Institute, Nottingham University Hospitals, Hucknall Rd, Nottingham, NG5 1PB United Kingdom
17Department of Radiology, Charles University in Prague, First Faculty of Medicine, U Nemocnice 2, 128 08 Praha 2, Czech Republic
18Department of Radiology, ImageRive, Rue de Rive 1, 1204 Genève, Switzerland
19Department of Radiology, Acibadem University Maslak Hospital, Buyukdere cd, Maslak, Sariyer, 34457 İstanbul, Turkey
20Dundee Cancer Centre, Clinical Research Centre, Ninewells Hospital, and Medical School, Tom McDonald Avenue, Dundee, UK
21Division of General Radiology, Department of Radiology, Medical University Graz, Auenbruggerplatz 9, 8036 Graz, Austria
22Department of Radiology, University of Cambridge, Cambridge Biomedical Campus, Hills Road CB2 0QQ, Cambridge, UK
23Institute of Radiology, ACC Steyr, Stadtplatz 30, 4400 Steyr, Austria
24Department of Radiology, Mater Misericordiae University Hospital/BreastCheck, BreastCheck, 36 Eccles St, Dublin 7, Ireland
25Referenzzentrum Mammographie Munchen, Sonnenstraße 29, 80331 Munich, Germany
26Diagnostic Department of Radiology, Tokuda Hospital Sofia, 1407 Sofia, 51B N Vaptsarov Blvd., Bulgaria
27Department of Radiology, Landspitali University Hospital, 108 Reykjavik, Iceland
28University Hospital of Aachen, Rheinisch-Westfälische Technische Hochschule, Pauwelsstraße 30, 52074 Aachen, Germany
29Radiotherapy I, The Oncology Institute ‘Prof. Dr. Ion Chiricuta’, Cluj-Napoca, 34-36 Republicii Street, RO-400015 Romania
30Department of Radiology Maria Sklodowska-Curie Memorial Cancer Centre and Institute of Oncology, Cracow Branch, Cracow, Poland
31Department of Radiology, Radboud University Nijmegen Medical Centre, Geert Grooteplein Zuid 10, 6525 GA Nijmegen, The Netherlands
32Department of Radiology/Breast Imaging, Instituto Português de Oncologia de Lisboa, Rua Professor Lima Basto, 1099-023 Lisboa, Portugal
33U.O. Radiodiagnostica, Candiolo Cancer Institute – FPO, IRCCS, Str. Prov. 142, km 3.95, 10060, Candiolo, Turin, Italy
34Genitourinary Radiology, Ghent University Hospital, De Pintelaan 185, 9000 Gent, Belgium
35Klinik für Radiologie, Neuroradiologie & Nuklearmedizin, Klinikum Frankfurt Hoechst, Frankfurt Germany
36Diagnoscan, SZTE Radiológiai Klinika, Szeged, Semmelweis u. 6, 6725 Szeged, Hungary
37Breast Imaging Unit, Scientific Institute (IRCCS) Ospedale San Raffaele, Via Olgettina, 60, 20132 Milan, Italy
38Department of Radiological, Oncological and Pathological Sciences, Sapienza University, Viale Regina Elena, 324, 00161 Rome, Italy
39Department of Imaging, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
40Department of Diagnostic Radiology, Oulu University Hospital, Kajaanintie 50, 90220 Oulu, Finland
41Department of Radiology and Medical Imaging, State University of Medicine and Pharmacy ‘Nicolae Testemitanu’, bul. St.cel Mare 165, Chisinau, MD 2012 Moldova
42Italian Group for Mammographic Screening (GISMa); Senology Unit, Local Health Authority, Bologna, Italy
43Marlene Greenebaum Diagnostic Breast Center, Department of Radiology, Hadassah Hebrew University Hospital, Hadassah Ein Kerem Medical Center, 91120 Jerusalem, Israel
44Clinic of Radiology, Alexander Dubček University of Trenčín in Trenčín, Faculty of Healthcare, Študentská 2, 911 50, Trenčín, Slovakia
45Radiology Centre, North Estonia Medical Centre, 19 Sütiste Street, 13419 Tallinn, Estonia
46Department of Radiology, Hôpital Lapeyronie, 371 Av. du Doyen Gaston Giraud, 34295 Montpellier, France
47Department of Radiology, Rigshospitalet Blegdamsvej and Glostrup, Mammography Screening Programme in Capital Region, Blegdamsvej 9, 2100 Copenhagen, Denmark
48Diagnostic Mammography Center, Kifisias 362, Chalandri, 15233 Athens Greece
49Duna Medical Center, Lechner Ödön fasor 7, 1095 Budapest, Hungary

Corresponding author.