# German CLL Study Group

Source: https://onco.cc/companies/german-cll-study-group/  
OnCo record `german-cll-study-group` (Company). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

The German CLL Study Group, founded in 1996 at the University of Cologne, runs the numbered CLL trials that set first-line treatment of chronic lymphocytic leukaemia, including CLL12, CLL13 (GAIA) and CLL14 in OnCo.

## Summary

The Deutsche CLL Studiengruppe (DCLLSG, German CLL Study Group) was founded in 1996 to improve the diagnosis and treatment of chronic lymphocytic leukaemia through controlled prospective trials, and describes itself as a research organisation of the University of Cologne specialising in CLL (dcllsg.de). ClinicalTrials.gov names it lead sponsor (OTHER class) of CLL12 (NCT02863718, phase 3, ibrutinib against placebo in early-stage CLL, with Janssen-Cilag as collaborator) and of CLL13 / GAIA (NCT02950051, phase 3, venetoclax combinations against chemoimmunotherapy in fit treatment-naive CLL, with Janssen-Cilag, Roche, AbbVie, HOVON, the Nordic CLL Study Group and others as collaborators); on CLL14 (NCT02242942, venetoclax and obinutuzumab in unfit CLL) the registry lead is Hoffmann-La Roche and the group is a collaborator, as the OnCo record's sponsor line says. It has no products of its own.

## Fields

- Kind: Company
- Last checked: 2026-09-25
- Also known as: Deutsche CLL Studiengruppe; DCLLSG; GCLLSG
- Tags: ctgov-sponsor; cooperative-group
- HQ: Cologne
- Type: cooperative-group
- Website: https://www.dcllsg.de

## Sources

- Official website: https://www.dcllsg.de
- ClinicalTrials.gov: trials led by German CLL Study Group: https://clinicaltrials.gov/search?lead=German%20CLL%20Study%20Group

## Connected records

- cancers: [Chronic lymphocytic leukaemia](https://onco.cc/cancers/cll/), [Chronic lymphocytic leukaemia, first treatment](https://onco.cc/cancers/cll-treatment-naive/), [Leukaemia (all types)](https://onco.cc/cancers/leukaemia/)
- trials: [CLL12](https://onco.cc/trials/cll12/), [CLL13 / GAIA](https://onco.cc/trials/cll13-gaia/), [CLL14](https://onco.cc/trials/cll14/)

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