(BCAC) Breast Cancer Association Consortium
The Breast Cancer Association Consortium (BCAC) is a forum of investigators interested in the inherited risk of breast cancer. Many groups are conducting studies with the aim of identifying genes that may be related to the risk of breast cancer. The aim of the consortium is to combine data from many studies, and to provide a reliable assessment of the risks associated with these genes.

(CIMBA) The Consortium of Investigators of Modifiers of BRCA1/2
The Consortium of Investigators of Modifiers of BRCA1/2 is a collaborative group of researchers working on genetic modifiers of cancer risk in BRCA1 and BRCA2 mutation carriers. The aim of CIMBA is to provide sufficient sample sizes to allow large scale studies in order to evaluate reliably the effects of genetic modifiers

(COGS) – Collaborative Oncological Gene-environment Study
A project funded by the European Commission and 7th Framework Programme. The central focus of the project is to define individual risk of breast-, ovarian- and prostate cancer. We use established datasets gathered from all over the world where patients with these three cancers have been identified. Lifestyle factors and genetic variants will be compared between patients and healthy controls.  iCOGS is a custom Illumina iSelect genotyping array, designed to test, in a cost-effective manner, genetic variants related to three hormone related cancers: breast, ovary and prostate. It was designed as part of COGS.

(OCAC) The Ovarian Cancer Association Consortium
OCAC is a forum of investigators of case-control studies of ovarian cancer, formed in April 2005. Many groups are conducting studies with the aim of identifying genes that may be related to the risk of ovarian cancer. The aim of the group is to combine data from many studies, to provide a reliable assessment of the risks associated with these genes.

(PRACTICAL) Prostate Cancer Association Group to Investigate Cancer Associated Alterations in the Genome
PRACTICAL is a collaborative group of researchers interested in inherited risk of prostate cancer. Many groups are conducting studies with the aim of identifying genes that may be related to the risk of prostate cancer. The aim of the group is to combine data from many studies, to provide a reliable assessment of the risks associated with these genes.