1.	Phase 1b Food Based Modulation of Biomarkers in Human Tissues at High-Risk for Oral Cancer. Phase: Phase II, Phase I Type: Biomarker/Laboratory analysis, Prevention Status: Active Age: 21 and over Sponsor: NCI, Other Protocol IDs: OSU-07085, NCI-2011-03226, R01CA127368, NCT01469429
2.	Phase I Chemoprevention Trial With Green Tea Polyphenon E and Erlotinib in Patients With Premalignant Lesions of the Head and Neck Phase: Phase I Type: Prevention Status: Active Age: 18 and over Sponsor: Other Protocol IDs: WCI1549-08, NCT01116336
3.	Smoking Cessation Treatment for Head and Neck Cancer Patients Phase: No phase specified Type: Behavioral study, Prevention Status: Active Age: 18 and over Sponsor: Other Protocol IDs: 0903004910, NCT00931021
4.	Prevent Exposure to Tobacco Smoke at Home [Gesunde Atemluft zu Hause] Phase: No phase specified Type: Behavioral study, Prevention Status: Approved-not yet active Age: 3 and under Sponsor: Other Protocol IDs: Krebshilfe-107539, DM8-IESO02, NCT00647413