American Gastrointestinal Association (AGA)

^{www.gastro.org}

American Institute for Cancer Research (AICR)

^www.aicr.org

American Lung Association

^www.aarc.org

American Pain Society (APS)

^{www.ampainsoc.org}

American Prostate Society

^{www.ameripros.org}

American Society for Blood and Marrow Transplantation (ASMBT)

^{www.asbmt.org}

American Society of Clinical Oncology (ASCO)

^www.asco.org

American Society of Hematology (ASH)

^{www.hematology.org}

American Society of Pediatric Hematology/Oncology (ASPH/O)

^{www.aspho.org}

Breast Cancer Society of Canada

^www.bcsc.ca

Canadian Oncology Society (COS)

^www.cos.ca

Colorectal Cancer Association of Canada (CCAC)

^{www.ccac-accc.ca}

European Organization Research and Treatment of Cancer (EORTC)

^www.eortc.be

European Society for Medical Oncology (ESMO)

^www.esmo.org

European Society for Therapeutic Radiology and Oncology (ESTRO)

^www.estro.be

International Union Against Cancer (UICC)
^{http://www.uicc.org}

IARC (International Agency for Research on Cancer)
^{http://www.iarc.fr}

National Comprehensive Cancer Network
^{http://www.nccn.org}

Federation of European Cancer Societies - FECS
^{http://www.fecs.be}

Instituto Nacional do Cancro (Brasil)
^{http://www.inca.gov.br}

ESSO – European Society of Surgical Oncology
^{http://www.esso-surgeonline.be}

SIOP – European Branch of the International Society of Paediatric Oncology
^{http://www.siop.nl}

 EANO – European Association for Neuro-oncology
^{http://www.eano.de}

 EUSOMA – European Society of Mastology
^{http://www.eusoma.org}

ESGO – European Society of Gynaecological Oncology
^{http://www.esgo.org}

International Society for Prevention Oncology (ISPO)

^{www.cancerprev.org/ISPO}

Kidney Cancer Association (KCA)

^www.nkca.org

Multiple Myeloma Association

^{www.webspawer.com/users/myelomaexchange}

Oncology Nursing Society (ONS)

^www.ons.org

European Oncology Nursing Society (EONS)

^{www.cancerword.org}

Associação Portuguesa Contra a Leucemia
^{www.contraleucemia.org}

Sociedade Portuguesa Oncologia (SPO)

^{www.sponcologia.pt}

Associação Portuguesa Leucemias e Linfomas

^www.apll.org

 Sociedade Portuguesa Hematologia (SPH)

^www.sph.org

Grupo Investigação Cancro Digestivo (GICD)

^www.gicd.pt