We would like to express our gratitude to University of British Columbia (UBC), BC Cancer Agency, OVCARE, TD Bank Group, and Kaggle for their sponsorship of the competition's prize awards and their invaluable support in organizing and facilitating the competition.                                      The organizers of the challenge extend their gratitude to the following institutions for their invaluable contribution to the data for this competition. * (HAW) Cancer Prevention and Control Program, Cedars Sinai Cancer, Cedars Sinai Medical Center, USA, * (CNI) CNI Study Data: Project "PI19/01730", funded by Instituto de Salud Carlos III (ISCIII) and co-funded by the European Union (FEDER), Spain, * (UKO) MRC Clinical Trials Unit at UCL, Institute of Clinical Trials and Methodology, University College London, United Kingdom, * (WMH) The Gynaecological Oncology Biobank at Westmead was funded by the National Health and Medical Research Council of Australia (ID310670, ID628903); the Cancer Institute NSW (12/RIG/1-17, 15/RIG/1-16); the Department of Gynaecological Oncology, Westmead Hospital; and acknowledges financial support from the Sydney West Translational Cancer Research Centre, funded by the Cancer Institute NSW (15/TRC/1-01), Australia, * (LAX) David Geffen School of Medicine, Department of Obstetrics and Gynecology, University of California at Los Angeles, Los Angeles, CA, USA * (VAN) Vancouver General Hospital, Canada * (TVA) OVAL-Alberta, Canada * (TVB) OVAL-British Columbia, Canada * (TUE) Tuebingen University Women's Hospital, Germany * (SEA) UK Studies of Epidemiology and Risk Factors in Cancer Heredity (SEARCH) Ovarian Cancer, United Kingdom * (POC) Poland Ovarian Cancer, Poland * (PEN) Penn Ovarian Cancer Research Center tumor bank, USA * (NCT) Natl. Centre of Tumor Diseases and the Dept. of Pathology, Heidelberg, Germany * (MAY) Mayo Clinic Ovarian Cancer Case Control, USA * (HOP) Hormones and Ovarian Cancer Prediction, USA * (CAL) Calgary HGSC chemoresistant, Canada * (BRZ) Brazil Gynecologic Tumor Bank, Brazil * (BAV) Bavarian Ovarian Cancer Cases and Controls * (AOV) OVarian Types * (OHSU) Oregon Health and Science University, USA * (TOR and DOV) Fred Hutch Cancer Center, USA * (AMC) Amsterdam Cancer Center, Netherlands