Australia – AUS-ALL (PI: Elizabeth Milne)
Brazil – Rio – Brazilian Collaborative Study Group (BCSG); Infant Acute Leukemia (IAL) (PI: Maria S. Pombo-de-Oliveira)
Brazil – Childhood cancer in São Paulo, Brazil: perinatal, reproductive and environmental risk factors (SAPPHIRE) (PI: Karina Braga Ribeiro)
Brazil – São Paulo (Bra-SP) (PI: Victor Wünsch Filho)
Canada – Quebec (Quebec) (PI: Claire Infante-Rivard)
Canada – Sainte Justine Hospital, Quebec (Qc-ALL) (PI: Daniel Sinnett)
Costa Rica – Costa Rican Childhood Leukemia Study (CRCLS) (PI: Ana María Mora)
Denmark – Maternal COMorbodities, Pharmaceutical use in pregnancy, And Childhood cancer: a record linkage study in Denmark (COMPAC) and Parental occupation and childhood cancer (POCC) (PIs: Julia Heck and Johnni Hansen)
Egypt – Children’s Cancer Hospital 57357 Egypt (CCHE) (PI: Sameera Ezzat)
Finland – Finnish REgister-base Case-control study of Childhood Leukemia (FRECCLE) (PI: Anssi Auvinen)
France – ADELE, ELECTRE, ESCALE, ESTELLE, and GEOCAP (PIs: Jacqueline Clavel and Denis Hémon)
Germany – German Childhood Cancer Registry (GCCR; studies included are LSP and WGP) (PIs: Joachim Schüz and Friederike Erdmann)
Greece – Nationwide Registry for Childhood Hematological Malignancies (NARECHEM) (PI: Eleni Petridou)
Guatemala – Cancer Epidemiology of Childhood Leukemia in Guatemala (CRECERÉ; Pilot Study) (PI: Libby Morimoto)
Italy – Modena Reggio Emilia (Reggio) (PI: Marco Vinceti)
Italy – Studio sulla Eziologia dei Tumori Infantili Linfoemopoietici (SETIL) (PI: Corrado Magnani)
Japan (PI: Kevin Uruyama)
Mexico – Mexican Inter-institutional Group for the Identification of the Causes of Childhood Leukemia (MIGICCL) (PI: Juan Manuel Mejía-Arangure)
New Zealand – New Zealand Childhood Case Control Study (NZCCS) (PI: John D. Dockerty)
Taiwan, China – Parental Comorbidities, Pharmaceutical Use, and Childhood Cancers: A Record Linkage Study in Taiwan (PIs: Pei Chen Lee and Julia Heck)
United Kingdom – Newcastle (PI: Richard McNally)
United Kingdom – United Kingdom Childhood Cancer Study (UKCCS) and Haematological Malignancy Research Network (HMRN) (PI: Eve Roman)
USA, California – California Childhood Leukemia Study (CCLS) (PI: Catherine Metayer)
USA, California – Genome Wide Association Study of Childhood Leukemia by Hispanic Status (USA-CCRLP-ALL) (PIs: Joe Wiemels and Xiaomei Ma)
USA – Children’s Cancer Group (CCG-E14, CCG-E15) (PI: Logan Spector)
USA – Children’s Oncology Group (COG-AE23, COG-AE24) (PIs: Erin Marcotte and Logan Spector)
USA, Texas – Childhood Cancer Epidemiology and Prevention Center, Texas Children’s Cancer and Hematology Centers (USA-TX) (PIs: Michael Scheurer and Philip Lupo)
USA, Washington – Collaborative Childhood Leukemia Studies in Washington State (PI: Beth Mueller)
Australia – CBT (PI: Elizabeth Milne)
Canada – Montreal CCS, Quebec (PI: Claire Infante-Rivard)
Denmark – Maternal COMorbodities, Pharmaceutical use in pregnancy, And Childhood cancer: a record linkage study in Denmark (COMPAC) and Parental occupation and childhood cancer (POCC) (PIs: Julia Heck and Johnni Hansen)
Egypt – ISET (PI: Sameera Ezzat)
France – ESCALE and ESTELLE (PIs: Jacqueline Clavel and Denis Hémon)
Germany – German Childhood Cancer Registry (GCCR; studies included are LSP and WGP) (PI: Joachim Schüz and Friederike Erdmann)
Greece – Nationwide Registry for Childhood Hematological Malignancies (NARACHEM) (PI: Eleni Petridou)
Italy – Modena Reggio Emilia (PI: Marco Vinceti)
New Zealand – New Zealand Childhood Case Control Study (NZCCS) (PI: John D. Dockerty)
United Kingdom – United Kingdom Childhood Cancer Study (UKCCS) (PI: Eve Roman)
USA, Washington – Collaborative Childhood Leukemia Studies in Washington State (PI: Beth Mueller)
USA, Texas – Childhood Cancer Epidemiology and Prevention Center, Texas Children’s Cancer and Hematology Centers, TX Registry Linkage (PI: Michael Scheurer)
USA, Minnesota – Minnesota Registry Linkage (PI: Logan Spector)
USA, California – Air Pollution and Childhood Cancer study (APCC) (PI: Julia Heck)