In study Arm A, potential participants are approached about the GEKKO study at the participating partner practices (see “Cooperation Partners”). Interested individuals are informed about the study on-site and are asked to provide a blood, saliva, and urine sample after agreeing to participate and signing the informed consent form. Participants are then given a questionnaire and a stool collection kit to take home. The participant takes the completed questionnaire and the stool samples to the practice at the time of the colonoscopy appointment. 

Infoflyer (German)

In study arm B, patients with indications of gastrointestinal, breast, and lung cancer are informed directly about the study through the corresponding clinics and recruited by members of the GEKKO study team. If the patient agrees, he or she will be asked once more for one blood, saliva, stool, and urine sample each.

Infoflyer (German)

Don't hesitate to get in touch with our study center, if you have any questions about the process. You will find our contact details further down in the text.

Various practices and clinics in the Heidelberg, Ludwigshafen, Sinsheim and Bruchsal area are cooperating with us in the GEKKO study. Informing and admitting the participants for the study takes place in the GEKKO study centers at the NCT or DKFZ and also in the practices and clinics of our cooperation partners.

Cooperating Institutions, Outpatient Clinics, and Hospitals:
 

Outpatient practices where the GEKKO team is recruiting on site:
 

• Dr. med. Johann-Thomas Schmidt
  Dr. med. Thorsten Schlenker
  Specialists in internal medicine and gastroenterology
  Praxis am Park
  Kurfürstenanlage 34
  69115 Heidelberg
  Phone: +49 6221 - 65 11 77
  Fax: +49 6221 - 65 11 799
  E-mail: info(at)praxis-schmidt-schlenker.de
  www.praxis-schmidt-schlenker.de
• Specialists for Internal Medicine
  Dr. med. Joachim Siedl
  Dr. med. Wolfgang Willareth
  Partnerschaftsgesellschaft (partnership company)
  Alte Waibstadter Staße 2c
  74889 Sinsheim
  Phone:  +49 7261 - 949 87 80
  Fax: +49 7261 - 949 87 87
  E-Mail: info(at)siedl-willareth.de
  www.siedl-willareth.de

Clinics recruiting for GEKKO:

• Fürst-Stirum-Clinic Bruchsal
  Study Department Intestinal Center
  Dr. Jan Philip Sarges 
  Frau Manuela Scherer-Stolz
  Gutleutstraße 1-14
  76646 Bruchsal
  Phone: +49 7251 - 70 80
• Clinical Center of the City of Ludwigshafen
  Medical Clinics A and C
  Dr. Klaus Baumann (Women´s Clinic), 
  Dr. Martina Dauscher-Zohlnhöfer (Breast Center),
  Professor Dr. Willis (Surgery)
  Bremserstrasse 79
  67063 Ludwigshafen
• Brüderklinikum Julia Lanz (Diako)
  Dr. med. Eva Kaiser (Department of Obstetrics and Gynecology) 
  Prof. Dr. med. Thalia Erbes (Head of Institute) 
  Speyerer Straße 91-93
  68163 Mannheim 

Outpatient practices and clinics assigning patients to us:

• Gynecologic Oncology
  National Center for Tumor Diseases (NCT) Heidelberg
  Prof. Dr. med. Andreas Schneeweiss
  Im Neuenheimer Feld 460
  69120 Heidelberg
• Interdisciplinary Endoscopy Center (IEZ) Heidelberg
  Prof. Dr. med. Peter Sauer / Prof. Dr. med. Anja Schaible, MBA
  www.iez-heidelberg.de
  Im Neuenheimer Feld 410
  69120 Heidelberg

Former cooperating outpatient clinics and hospitals: who took part in the GEKKO study:

• Dr. med. Fadi Chahoud, Specialist in internal medicine, Gastroenterology, Health Center Bethanien at Agaplesion Bethanien Hospital Heidelberg
• Dr. med. Martin Fischer, Gastroenterology Bad Schönborn
• Dr. med. Lars Helmstädter, Gastroenterologie im Mathematikon, Heidelberg
• Prof. Dr. med. Robert Ehehalt, Praxis für Gastroenterologie Heidelberg
• Gemeinschaftspraxis Dr. med. Isabelle Neureither and Dr. med. Sabine Schumacher, Heidelberg
• Praxis Drs. med. Hecker & Thome, ATOS Klinik Heidelberg
• Praxis Prof. Dr. med. Birgit Kallinowski, Gastroenterologie Schwetzingen
• Internistische Facharztpraxis Drs. med. Gernot Gast and Peter Wagner, Weinheim
• Schwerpunktpraxis für Gastroenterologie Dr. med. Jürgen Weers, Mannheim
• Schwerpunktpraxis Dr. med. Norbert Bruhn, Gastroenterologie / Hämatologie & Onkologie, Karlsruhe
• Gastroenterologie und Innere Medizin I, PD Dr. med. Uwe Seitz, Kreiskrankenhaus Bergstraße, Heppenheim
• Robert-Bosch-Krankenhaus, Klinik Schillerhöhe, Gerlingen
• Thoraxklinik, Universitätsklinikum Heidelberg