GEKKO

In study arm A, potential participants receive an information folder about the GEKKO study when they visit their gastroenterologist. The folder includes additional information about the study, for example, a flyer in German and other relevant participant information. In addition, it contains a short questionnaire on health behavior and lifestyle. Completing the questionnaire takes about 15 minutes.

We ask our participants to make an appointment with the NCT Heidelberg by phone before making the appointment for the colonoscopy with the physician. During their visit to the NCT Heidelberg, they receive detailed information about the study. After confirming their participation in the study and signing the informed consent form, we ask them to provide one sample each of blood, saliva, urine, and stool. As an expense allowance, participants will receive a prevention bag with practical suggestions and current recommendations for a healthy lifestyle, as well as the latest information on cancer prevention, especially colorectal cancer prevention. A voucher for the cafeteria at the NCT Heidelberg and parking reimbursement are also included.

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.

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 Heidelberg, Mannheim, Ludwigshafen, Schwetzingen, Sinsheim, and Bruchsal currently cooperate with us for 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.

Our current cooperation partners:

Practices where the GEKKO team is 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: 06221 - 65 11 77
  Fax: 06221 - 65 11 799
  E-mail: info@praxis-schmidt-schlenker.de
  www.praxis-schmidt-schlenker.de
• Dr. med. Lars Helmstädter
  Gastroenterology in the Mathematikon
  Berliner Straße 47
  69120 Heidelberg
  Phone: +49 62 21 - 427 92 20
  Fax: +49 62 21 - 427 92 21
  E-mail: info@praxis-helmstaedter.de
  www.praxis-helmstaedter.de
• Specialists for Internal Medicine
  Dr. med. Joachim Siedl
  Dr. med. Wolfgang Willareth
  Partnerschaftsgesellschaft (partnership company)
  Alte Waibstadter Staße 2c
  74889 Sinsheim
  Phone:  07261 - 949 87 80
  Fax: 07261 - 949 87 87
  E-Mail: info@siedl-willareth.de
  www.siedl-willareth.de

Clinics recruiting for GEKKO:

• Fürst-Stirum-Clinic Bruchsal
  Study Department Intestinal Center
  Prof. Dr. med. Tom M. Ganten
  Ms. Jeanette Fehrer
  Gutleutstraße 1-14
  76646 Bruchsal
  Phone: 07251 - 70 80
• Kreiskrankenhaus Bergstraße (District Hospital Bergstraße)
  Internal Medicine I
  PD Dr. med. Uwe Seitz
  Ms. Monika Post
  Viernheimer Straße 2
  64646 Heppenheim
  Phone: 07281 - 701 702
• Clinical Center of the City of Ludwigshafen
  Bremserstraße 79
  67063 Ludwigshafen

Referring practices and clinics:

• Prof. Dr. med. Robert Ehehalt
  www.hd-gastro.de
• Joint practice Dr. med. Isabelle Neureither and Dr. med. Sabine Schumacher
  www.internistinnen-hd.de
• Interdisciplinary Center for Endoscopy Heidelberg, Prof. Dr. Peter Sauer
  www.iez-heidelberg.de
• Practice Hecker & Thome ATOS Klinik Heidelberg
  www.hecker-thome.de
• Practice Prof. Dr. med. Birgit Kallinowski
  www.gastroenterologie-schwetzingen.de
• Practice Dr. med. Jürgen Weers
  www.praxis-weers.de

Cooperation partners, who participated in GEKKO participant recruitment:

• Robert-Bosch-Hospital
  Klinik Schillerhöhe
  Solitudestraße 18
  70839 Gerlingen
• Internistic speacialist practice Weinheim
  Drs. Gast und Wagner
  Röntgenstrasse 3
  69469 Weinheim
• Thoraxclinic
  Röntgenstrasse 1
  69126 Heidelberg